10 Formal Informal Words to Master in 2026

Welcome to the essential guide on navigating the world of formal and informal words. The difference between 'get' and 'obtain' or 'start' and 'initiate' is not just about vocabulary; it is about context, tone, and audience perception. In a world of professional emails, academic papers, and casual team messages, the ability to consciously switch your register is more critical than ever. Choosing the right word can make you sound authoritative, approachable, or completely out of touch.

This guide moves beyond generic advice to provide a practical toolkit for professionals, students, and writers. We will explore 10 common pairs of formal and informal words, complete with clear rules and real-world examples for when to use each. Mastering this skill is also key when working with automated systems. Even in the realm of artificial intelligence, a guide on how to prompt AI to write like a human shows that word choice is fundamental to achieving the right tone.

By the end of this listicle, you will have actionable strategies for calibrating your language with precision, ensuring your message always lands exactly as intended.

1. Utilize vs Use

The choice between "utilize" and "use" is a classic example of formal informal words impacting tone. While often used interchangeably, "utilize" carries a more formal, academic weight. It suggests making effective or strategic use of a resource, often to its fullest potential or for a purpose it wasn't originally designed for. In contrast, "use" is the straightforward, all-purpose verb for employing something.

Overusing "utilize" can make writing sound pretentious or overly complex, a common pitfall that makes text feel robotic. You can discover more about these types of AI writing mistakes and how to correct them to maintain a natural voice. While academic papers and technical reports might require the precision of "utilize," modern business communication increasingly favors the clarity and accessibility of "use."

How to Choose the Right Word

Consider your context and intended meaning. Is the action simply about employing a tool, or is it about a more complex, strategic application?

• Formal: "The team will utilize machine learning algorithms to forecast market trends." (Implies a strategic, complex application).
• Informal: "We will use the new software to track our expenses." (A direct, simple action).

Pro Tip: When in doubt, default to "use." It's almost never wrong. "Utilize" is only correct when you specifically mean to employ something for a practical or profitable end, especially in a new or creative way. Using a more direct word often improves readability and connects better with a broader audience.

2. Initiate vs Start

The difference between "initiate" and "start" is a clear marker of formal informal words that shapes the tone of your message. "Initiate" implies beginning a formal process or a structured series of actions, making it common in legal, technical, and corporate environments. In contrast, "start" is the universal, direct, and more conversational word for beginning anything, from a task to a journey.

Opting for "initiate" when it isn't necessary can make communication feel bureaucratic or distant. For instance, government documents might state, "Initiate protocol compliance procedures," where the formality is expected. However, for most everyday and customer-facing content, the simplicity of "start" is more effective and engaging. Marketing copy that says "Start your free trial today" is much more direct and inviting than "Initiate your free trial."

How to Choose the Right Word

Your choice should depend on the established conventions of your field and the desired relationship with your audience. Is this the first step in a complex, official procedure, or just the beginning of a simple action?

• Formal: "Please initiate the new client onboarding process by Monday." (Refers to a structured, multi-step procedure).
• Informal: "Let's start the project kickoff meeting at 10 AM." (A simple, direct beginning).

Pro Tip: Use "start" as your default for clear, accessible communication. Reserve "initiate" for contexts where you need to convey the formal launch of a specific, documented process. In most modern writing, choosing the simpler word makes your content more readable and relatable.

3. Endeavor vs Try

The distinction between "endeavor" and "try" is a nuanced example of formal informal words that can signal different levels of commitment and seriousness. "Endeavor" is a formal verb that suggests a prolonged, earnest, and often difficult effort toward a significant goal. In contrast, "try" is a direct, everyday word that simply means to make an attempt, without the same implication of sustained striving.

Choosing "endeavor" lends gravity and a sense of high purpose to a statement, making it a powerful choice for mission statements or descriptions of aspirational goals. Its use can make an action feel more like a noble pursuit. On the other hand, the accessibility of "try" makes it perfect for instructions, customer communication, and agile environments where experimentation is key. Overusing "endeavor" can sound stilted, while "try" might understate the magnitude of an effort in certain formal contexts.

How to Choose the Right Word

Your word choice should reflect the scope of the effort and your audience's expectations. Is the action a simple attempt or a significant undertaking?

• Formal: "We will endeavor to exceed customer expectations at every touchpoint." (Suggests a deep, ongoing company-wide commitment).
• Informal: "We will try to get your order shipped out by tomorrow." (A straightforward, action-oriented promise).

Pro Tip: Reserve "endeavor" for articulating core values, missions, or significant, long-term goals. For daily operations and direct communication, "try" is more relatable and clear. In startup culture, for instance, "We try new approaches daily" sounds dynamic, whereas "We endeavor to discover new approaches" could seem overly dramatic.

4. Subsequently vs Later/Then

The difference between "subsequently" and "later/then" highlights how formal informal words can control narrative flow and tone. "Subsequently" is a formal adverb used to indicate a logical or chronological sequence, common in academic papers, legal documents, and official reports. It suggests an event that follows another as a consequence or in a specific order. In contrast, "later" and "then" are more common, conversational terms that simply mark the passage of time.

Choosing "subsequently" lends a serious, analytical air to your writing, fitting for contexts where precision is key. However, its use in casual content like a blog post or email can feel stiff and overly academic, creating a barrier with the reader. Simpler words like "later" or "then" make the sequence feel more natural and direct, improving readability for a general audience.

How to Choose the Right Word

Your choice depends entirely on your audience and the formality of the document. "Subsequently" connects ideas logically, while "later" or "then" connect them chronologically in a simpler way.

• Formal: "The committee reviewed the initial proposal; subsequently, a revised version was drafted for approval." (Indicates a direct procedural step).
• Informal: "We got the first draft done. Later, we wrote a new version based on the feedback." (A straightforward sequence of events).

Pro Tip: Use "subsequently" when an action is a direct result or next logical step following a previous one, especially in formal writing. For all other situations, "later" or "then" are clearer and more effective. Overusing formal adverbs can make sentences longer and more complex than necessary, so prioritize clarity.

5. Obtain vs Get

The distinction between "obtain" and "get" is a fundamental pair of formal informal words that signal a document's tone. "Obtain" is more formal and often implies a process, effort, or a transactional exchange to acquire something. Conversely, "get" is the casual, direct, and universally understood verb for receiving or acquiring. The word you choose can instantly shift your writing from official and procedural to friendly and accessible.

Using "obtain" is common in legal documents, academic instructions, and official government procedures where the process of acquiring something is as important as the item itself. However, in modern marketing, user guides, and everyday communication, the simplicity of "get" is far more effective. Forcing "obtain" into a casual context, like a social media post, can make the message sound stiff and disconnected.

How to Choose the Right Word

Your choice should align with the document's purpose and the reader's expectations. Are you outlining a formal requirement or a quick, simple action?

• Formal: "Applicants must obtain a reference number before submitting their form." (Suggests a necessary step in a formal process).
• Informal: "Get your free trial started in just 30 seconds." (Emphasizes speed and ease).

Pro Tip: Match the verb to the context. Use "obtain" for contracts, legal notices, and official procedures where a certain level of formality is required. For user instructions, marketing copy, and conversational content, "get" is almost always the better, more readable choice. It connects with a broader audience by removing unnecessary friction.

6. Terminate vs End/Stop

The distinction between "terminate" and "end/stop" is a crucial example of how formal informal words can dramatically alter the tone, especially in sensitive situations. "Terminate" is a highly formal and definitive term, often carrying legal or contractual weight. It is most commonly found in official documents related to employment, services, or agreements. In contrast, "end" or "stop" are more neutral, everyday words for bringing something to a conclusion.

Using "terminate" in a casual conversation can sound harsh, cold, and overly bureaucratic. This is particularly true in employee communications, where the emotional impact of language is significant. While a formal HR document must use precise legal language, a manager delivering the news will often opt for softer phrasing to maintain a degree of humanity. Learning how to humanize AI text without changing meaning is key to navigating such distinctions, ensuring your message is both clear and appropriate for the context.

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How to Choose the Right Word

Your choice depends entirely on the formality of the situation and the intended audience. Is this a legal notice or a conversation with a colleague?

• Formal: "The company reserves the right to terminate the contract due to non-compliance." (Official, legal context).
• Informal: "We have to end our working relationship." (A more personal, direct conversation).

Pro Tip: Reserve "terminate" for official, legal, and HR documents where precision is required. For internal or direct communications, "end" or "stop" are almost always better choices. They convey the same outcome without the cold, impersonal tone that can damage morale and relationships.

7. Facilitate vs Help/Make Easier

The distinction between "facilitate" and "help" or "make easier" is a key indicator of formal informal words in professional and academic writing. "Facilitate" is a formal term that implies enabling or creating the conditions for a process to happen more smoothly. It suggests a structural or procedural role. In contrast, "help" and "make easier" are direct, conversational terms that describe providing assistance in a more hands-on, accessible way.

While "facilitate" can sound professional in reports or strategic documents, it can also create distance and feel overly bureaucratic in marketing or customer-facing communication. Using a simpler alternative like "help" often makes the message clearer and more relatable. Finding the right balance is crucial; you can learn more about how to check if your writing sounds human and natural to avoid this common issue.

How to Choose the Right Word

Your choice depends heavily on your audience and the context of the action. Are you describing a high-level process or a direct benefit to a user?

• Formal: "The new software is designed to facilitate seamless data integration between departments." (Focuses on the process and structure).
• Informal: "This tool helps you combine data from different sources." (Focuses on the direct user benefit).

Pro Tip: Use "facilitate" when describing the management of a process, meeting, or system. For most other situations, especially in marketing copy or instructions, "help" or "make easier" is more direct and effective. It communicates the benefit to the user without corporate jargon, strengthening your message.

8. Inquire vs Ask

The distinction between "inquire" and "ask" is a fundamental example of how formal informal words shape the tone of communication. "Inquire" suggests a formal, often methodical, process of seeking information, making it a staple in official correspondence and procedural writing. In contrast, "ask" is the universal, direct, and more conversational term for posing a question.

Choosing "inquire" signals a level of seriousness and respect, which is appropriate for initial business contacts or formal complaints. However, its overuse can make communication feel distant or overly bureaucratic. Modern customer service and internal communications often prefer the directness and warmth of "ask" to build rapport and sound more approachable. Understanding this difference is key to matching your language to your audience's expectations.

How to Choose the Right Word

Your choice should depend on the context of your communication and the relationship with your audience. Is it a formal request for information or a simple, direct question?

• Formal: "We would like to inquire about the status of our application." (Suggests a formal, procedural check).
• Informal: "Can we ask when you'll have an update for us?" (A more direct and casual follow-up).

Pro Tip: Use "inquire" for official requests, written complaints, or when addressing an organization for the first time. Stick with "ask" for most daily interactions, including customer support emails and internal team messages. If you’re unsure, "ask" is the safer, more personable choice that rarely feels out of place.

9. Numerous vs Many/A Lot

The choice between "numerous" and "many/a lot" is a key distinction in the world of formal informal words that directly influences the tone and sophistication of your writing. "Numerous" is a formal adjective that signifies a large, but indefinite, number of things. Its counterpart, "many" or the even more conversational "a lot," communicates the same idea of quantity but with a more accessible and everyday feel.

Using "numerous" can add a touch of academic or literary weight to a sentence, making it suitable for professional reports, scholarly articles, or official announcements. However, its formality can sometimes feel stiff in more casual contexts like blogs or social media posts, where the directness of "many" or "a lot" connects more effectively with the audience. Balancing these options is crucial for setting the right register.

How to Choose the Right Word

Your choice should depend on your audience, platform, and the desired impression. Is your goal to sound authoritative and formal, or relatable and clear?

• Formal: "The initiative has faced numerous challenges since its inception." (Suits a formal business or academic report).
• Informal: "We've had a lot of problems with this project from the start." (A more direct, conversational tone for internal team communication).

Pro Tip: Pay attention to readability scores. Words like "many" and "a lot" are simpler and generally improve readability, making your content more accessible to a wider audience. Reserve "numerous" for situations where a formal, slightly more detached tone is specifically required.

10. Accordingly vs So/Therefore

The connectors you choose to show cause and effect, like "accordingly," "so," and "therefore," are powerful indicators of tone. "Accordingly" signals a formal, logical progression, often found in official reports or academic writing. It implies that an action was taken as a direct and appropriate response to a previously stated fact. In contrast, "so" is the most common and conversational connector, perfect for everyday speech and informal writing, while "therefore" occupies a middle ground, fitting well in business and technical contexts.

The distinction between these formal informal words significantly affects sentence flow and perceived sophistication. "Accordingly" often introduces a longer, more complex clause, adding weight to the statement. "So" keeps sentences short and direct, improving readability. "Therefore" provides a clear, logical link without feeling overly stiff, making it a reliable choice for professional communication where clarity is key.

How to Choose the Right Word

Your choice should align with your document's purpose and your relationship with the audience. Are you presenting a formal analysis or a casual update?

• Formal: "The market research revealed a shift in consumer preferences; accordingly, our product development strategy was adjusted." (A logical, formal consequence).
• Informal: "Our customers wanted new features, so we built version 2.0 to include them." (A simple, direct cause-and-effect).
• Technical/Professional: "The primary server failed to respond; therefore, all user sessions were terminated." (A clear, logical outcome in a professional context).

Pro Tip: Pay attention to sentence complexity. "Accordingly" works best when connecting two substantial, independent ideas. For simpler connections, "so" or "therefore" are often more effective. In most modern business writing, "therefore" strikes a great balance between formality and directness.

Formal vs Informal: 10 Word Pairs

Item	Implementation Complexity 🔄	Resource Requirements ⚡	Expected Outcomes ⭐	Ideal Use Cases 💡	Key Advantages 📊
Utilize vs Use	🔄 Low — simple word swap; affects syllable count/readability	⚡ Minimal — no added tools required	⭐ Increases formality vs improves clarity and speed of reading	💡 Formal reports/methods (utilize) vs emails/UX copy (use)	📊 Precise tone control; easy to apply
Initiate vs Start	🔄 Low — direct substitution; suits procedural phrasing	⚡ Minimal	⭐ 'Initiate' raises formality; 'start' improves engagement	💡 Business/process docs (initiate) vs customer-facing content (start)	📊 Better register alignment for processes vs general audiences
Endeavor vs Try	🔄 Low — single-word nuance change	⚡ Minimal	⭐ 'Endeavor' signals sustained commitment; 'try' feels authentic	💡 Mission statements/aspirational copy (endeavor) vs everyday comms (try)	📊 Controls perceived effort and ambition
Subsequently vs Later/Then	🔄 Low — connector swap may lengthen sentences	⚡ Minimal	⭐ 'Subsequently' implies logical causality; 'later/then' quickens pace	💡 Academic/legal writing (subsequently) vs blogs/narratives (later/then)	📊 Balances logical rigor with readability
Obtain vs Get	🔄 Low — straightforward substitution; watch register	⚡ Minimal	⭐ 'Obtain' formalizes procedures; 'get' increases accessibility	💡 Contracts/manuals (obtain) vs marketing/user instructions (get)	📊 Matches legal formality or consumer clarity
Terminate vs End/Stop	🔄 Low but sensitive — may require legal review	⚡ Low — potential need for legal resources	⭐ 'Terminate' gives legal finality; 'end/stop' is less harsh	💡 HR/contracts/legal docs (terminate) vs internal/empathetic comms (end/stop)	📊 Manages legal precision and emotional impact
Facilitate vs Help/Make Easier	🔄 Low — nuance between enabling vs direct assistance	⚡ Minimal	⭐ 'Facilitate' elevates professional tone; 'help' aids comprehension	💡 Academic/management texts (facilitate) vs product/customer copy (help)	📊 Balances sophistication with user adoption
Inquire vs Ask	🔄 Low — depends on relationship/formality	⚡ Minimal	⭐ 'Inquire' formalizes requests; 'ask' promotes approachability	💡 Official correspondence/requests (inquire) vs support/conversational (ask)	📊 Optimizes tone by relationship and context
Numerous vs Many/A Lot	🔄 Low — simple quantity-word swap	⚡ Minimal	⭐ 'Numerous' sounds formal; 'many/a lot' improves readability	💡 Academic/reports (numerous) vs social media/blogs (many/a lot)	📊 Adjusts sophistication and reading-level impact
Accordingly vs So/Therefore	🔄 Low — connector choice alters sentence flow	⚡ Minimal	⭐ 'Accordingly' signals formal consequence; 'so' aids narrative; 'therefore' is middle ground	💡 Formal reports (accordingly), business/technical (therefore), casual (so)	📊 Controls logical tone and reader processing speed

From Theory to Practice: Putting It All Together

Navigating the spectrum of formal informal words is a foundational skill for any effective writer. It's the difference between a message that lands perfectly and one that feels awkward or out of place. As we've explored, the distinction isn't always about "right" versus "wrong" but about "appropriate" versus "inappropriate." The goal is to build a mental toolkit that allows you to select the precise word for the job, every single time.

This means moving beyond simple substitution. Instead of automatically swapping "get" for "obtain" in every professional document, you must first consider the context. Is the tone meant to be authoritative and distant, or collaborative and accessible? The answer dictates whether a formal term like "subsequently" is necessary or if a simpler word like "later" would be more effective in building rapport with your reader.

Key Takeaways for Immediate Application

To turn these concepts into habits, focus on these core principles:

• Audience First, Always: Before you write, create a clear picture of your reader. An academic committee expects different language ("initiate," "endeavor") than a customer reading a blog post ("start," "try"). This single step will resolve most of your tonal questions.
• Context Defines Formality: The platform and purpose are just as important as the audience. A legal notice demands formal precision ("terminate"), while a team chat update thrives on informal clarity ("end"). Mismatching the two can undermine your message's credibility.
• Simplicity Is Often a Strength: Don't mistake complex words for better writing. Using words like "numerous" or "facilitate" can add weight and specificity, but often a direct alternative like "many" or "help" is clearer and more powerful. Aim for precision, not pretension.

Making Intentional Choices Your New Default

The true value in mastering formal informal words lies in the control it gives you. You are no longer just conveying information; you are shaping the reader's experience. You can build authority, create a personal connection, project confidence, or express empathy, all through deliberate word choice.

Pro Tip: When editing your own work, or especially AI-generated drafts that often default to an overly formal or robotic tone, actively hunt for these word pairs. Ask yourself: "Is this word doing a specific job, or is it just there to sound smart?" This critical question will help you refine your voice and improve clarity.

This skill is not about memorizing lists. It is about developing an intuition for language and tone. It's an ongoing practice of observation, analysis, and refinement that will ultimately make you a more versatile, persuasive, and successful communicator in any field.

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