500 Formal vs Informal Words in English with Pictures

Formal and informal words are important parts of English communication, helping us choose suitable language for different people, places, and situations. Formal words are commonly used in academic, professional, and official settings, while informal words are more natural in casual conversations with friends and family. Learning formal and informal words in English is a useful way to improve vocabulary and communicate appropriately in speaking and writing. Understanding these differences also helps learners choose the right tone for each situation. In this article, you will learn 500 formal vs informal words with clear examples and pictures, helping students and English learners understand, remember, and use them confidently.

What Are Formal and Informal Words?

Formal words are polite, professional, and suitable for official communication. They are commonly used in schools, workplaces, business meetings, academic writing, reports, and formal emails. Informal words are relaxed, friendly, and commonly used in everyday conversations with friends, family, classmates, and people you know well.

When to Use Formal Words

Use formal words when writing or speaking in situations such as:

• Business emails
• Job applications
• Academic essays
• Research papers
• Official letters
• Presentations
• Government documents
• Professional meetings

Example

Formal: I would appreciate your assistance.

Informal: Can you help me?

When to Use Informal Words

Informal words are suitable for:

• Conversations with friends
• Family discussions
• Social media chats
• Text messages
• Personal emails
• Casual conversations

Example

Formal: I apologize for the delay.

Informal: Sorry, I’m late.

Commonly Used Formal vs Informal Vocabulary Words

Commonly Used Formal vs Informal Vocabulary Words

Everyday Formal and Casual Vocabulary Differences

Formal	Informal	Formal	Informal
Postpone	Put off	Retain	Keep
Occupy	Take up	Appear	Show up
Utilize	Use	Ascertain	Find out
Authorize	Okay	Consult	Ask
Commence	Kick off	Prohibit	Ban
Contain	Hold	Discontinue	Quit
Establish	Set up	Observe	See
Facilitate	Help	Function	Work
Illustrate	Show	Implement	Carry out
Indicate	Point out	Initiate	Start
Integrate	Mix in	Maintain	Keep up
Neglect	Skip	Notify	Let know
Operate	Run	Predict	Guess
Provide	Give	Receive	Get
Recognize	Spot	Recommend	Suggest
Reflect	Think about	Reinforce	Back up
Remove	Take away	Resolve	Sort out
Resume	Pick up	Review	Go over
Secure	Lock down	Specify	Point out

Everyday Formal and Casual Vocabulary Differences

Most Common Polite vs Casual English Words

Formal	Informal	Formal	Informal
Submit	Hand in	Suggest	Put forward
Terminate	Fire	Apologize	Say sorry
Author	Writer	Continue	Keep going
Appreciate	Be thankful	Inquire	Ask
Verify	Double-check	Consider	Think about
Acknowledge	Admit	Acquire	Grab
Approve	Say yes	Attempt	Give it a go
Clarify	Explain	Disapprove	Say no
Disclose	Spill	Evaluate	Check out
Exhibit	Show off	Finalize	Wrap up
Forecast	Predict	Generate	Make
Interact	Talk to	Justify	Explain
Maximize	Get the most	Minimize	Cut down
Notify	Let know	Obtain	Pick up
Postpone	Delay	Recognize	Know
Reflect	Think back	Reject	Say no to
Represent	Speak for	Resolve	Fix up
Respond	Text back	Specify	Say clearly
Strengthen	Beef up	Suggest	Bring up

Most Common Polite vs Casual English Words

Commonly Used Formal vs Informal Words in English

Formal	Informal	Formal	Informal
Transport	Move	Proceed	Go ahead
Generate	Come up with	Encounter	Bump into
Contract	Deal	Destroy	Wreck
Collaborate	Work with	Conserve	Save
Contribute	Chip in	Diminish	Go down
Dominate	Take over	Establish	Kick off
Enhance	Boost	Examine	Check out
Expand	Grow	Express	Say
Guarantee	Promise	Handle	Deal with
Identify	Pick out	Impact	Hit
Influence	Sway	Initiate	Kickstart
Inspect	Look at	Involve	Bring in
Maintain	Keep up	Motivate	Fire up
Organize	Set up	Participate	Join
Persist	Keep at it	Prepare	Get ready
Prevent	Stop	Promote	Push
Pursue	Go after	Reflect	Think back
Reinforce	Support	Repair	Patch up
Respond	Hit back	Reveal	Spill

Commonly Used Formal vs Informal Words in English

Simple Comparison of Business vs Friendly English vocabulary words

Formal	Informal	Formal	Informal
Schedule	Plan	Register	Sign up
Allocate	Hand out	Anticipate	Expect
Authorize	Approve	Benefit	Gain
Clarify	Make clear	Collaborate	Work with
Concentrate	Focus on	Consider	Think of
Consolidate	Bring together	Continue	Keep going
Coordinate	Work with	Criticize	Slam
Decline	Turn down	Delay	Put off
Delegate	Hand off	Deliver	Drop off
Deny	Say no	Detect	Spot
Determine	Figure out	Devote	Put time in
Emphasize	Point out	Engage	Get involved
Ensure	Make sure	Establish	Set up
Evaluate	Size up	Examine	Look at
Expand	Spread out	Forecast	Guess
Formulate	Come up with	Generate	Create
Identify	Find	Illustrate	Show
Improve	Fix	Indicate	Point out
Install	Set up	Intervene	Step in

Simple Comparison of Business vs Friendly English vocabulary words

Daily use of Polite vs Casual Word Alternatives

Formal	Informal	Formal	Informal
Absence	Time off	Accompany	Go with
Accumulate	Pile up	Address	Talk to
Adjourn	Break off	Allocate	Split up
Anticipate	Look forward	Articulate	Say clearly
Augment	Add to	Authenticate	Prove
Await	Wait	Cancel	Scrap
Compensate	Pay back	Conclude	Wrap it up
Confiscate	Take away	Constitute	Make up
Contemplate	Think over	Contradict	Go against
Critique	Give notes	Defend	Back up
Depict	Paint	Designate	Pick
Detect	Catch	Deter	Scare off
Devastate	Wreck	Differentiate	Tell apart
Disperse	Spread out	Endure	Push through
Enforce	Make happen	Enquire	Ask around
Expand	Blow up	Extract	Pull out
Finalize	Wrap up	Forge	Fake
Imply	Hint	Initiate	Kick off
Inhibit	Hold back	Instruct	Teach

Daily use of Polite vs Casual Word Alternatives

Commonly Confused Formal and Informal Word Pairs

Formal	Informal	Formal	Informal
Interrupt	Cut in	Involve	Include
Isolate	Keep away	Justify	Make up for
Limit	Cap	Manipulate	Mess with
Mediate	Step in	Mention	Bring up
Monitor	Keep track	Navigate	Find your way
Obtain	Snag	Officiate	Run the show
Omit	Leave out	Oppose	Be against
Organize	Sort out	Outline	Sketch out
Oversee	Watch over	Participate	Jump in
Perceive	Pick up on	Permit	Give the okay
Persuade	Talk into	Predict	Call it
Prepare	Gear up	Present	Show off
Prioritize	Put first	Prohibit	Shut down
Promote	Hype up	Propose	Pitch
Pursue	Chase	React	Freak out
Recommend	Give tips	Refer	Point to
Reflect	Look back	Refuse	Say no
Reinforce	Build up	Relocate	Move
Remind	Nudge	Renew	Refresh

Commonly Confused Formal and Informal Word Pairs

Formal English to Casual Everyday Words

Formal	Informal	Formal	Informal
Replace	Swap	Report	Tell on
Represent	Stand for	Request	Shout out
Resolve	Patch up	Respond	Hit back
Restrict	Keep out	Retain	Hang on to
Retrieve	Get back	Reveal	Let slip
Review	Look back	Schedule	Plan out
Secure	Tie down	Select	Pick
Separate	Split	Settle	Work out
Specify	Nail down	Strengthen	Toughen up
Submit	Hand over	Suggest	Drop a hint
Summon	Call over	Support	Back up
Terminate	Cut loose	Transform	Switch up
Transmit	Send over	Understand	Get it
Update	Fill in	Utilize	Use up
Validate	Confirm	Visit	Drop by
Volunteer	Step up	Warn	Heads-up
Withdraw	Pull out	Witness	See happen
Yield	Give way	Achieve	Pull off
Absorb	Soak up	Accelerate	Speed up

Formal English to Casual Everyday Words

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500 Most Common Formal vs Informal Words

Formal	Informal	Formal	Informal
Acquire	Snap up	Address	Speak to
Adjust	Tweak	Advise	Tip off
Amend	Fix up	Approve	Green light
Assess	Size up	Assign	Give out
Assist	Lend help	Assume	Think
Attach	Stick on	Attempt	Give it a shot
Avoid	Steer clear	Balance	Keep even
Behave	Act right	Belong	Fit in
Categorize	Sort	Clarify	Spell out
Collaborate	Team up	Compare	Line up
Comprehend	Figure out	Confirm	Say yes
Connect	Link up	Conserve	Hold onto
Contribute	Help out	Cooperate	Get along
Correspond	Match	Decline	Say nope
Define	Spell out	Deliver	Drop off
Design	Draw up	Devote	Put in time
Disagree	Butt heads	Disconnect	Unplug
Discontinue	Shut off	Educate	Teach
Emphasize	Push	Encourage	Cheer on

500 Most Common Formal vs Informal Words

Everyday Used Formal vs Informal Words in English

Formal	Informal	Formal	Informal
Endorse	Back	Enhance	Amp up
Enquire	Check in	Entitle	Give rights
Expand	Blow up	Finalize	Close out
Forecast	Call ahead	Formulate	Map out
Grant	Give	Hinder	Block
Identify	Call out	Implement	Put in place
Improve	Step up	Incur	Rack up
Influence	Rub off	Inspire	Fire up
Install	Hook up	Introduce	Bring in
Investigate	Dig into	Involve	Rope in
Join	Sign on	Justify	Back up
Launch	Roll out	Maintain	Keep up
Manage	Handle	Merge	Blend in
Modify	Switch	Motivate	Pump up
Nominate	Put up	Observe	Watch
Obtain	Bag	Offer	Put up
Oppose	Push back	Organize	Line up
Outline	Lay out	Participate	Jump in
Persuade	Win over	Postpone	Push back

Everyday Used Formal vs Informal Words in English

Most Common Formal and Informal Words in English

Formal	Informal	Formal	Informal
Present	Hand in	Proceed	Carry on
Promote	Talk up	Protect	Look after
Pursue	Follow	React	Lash out
Recognize	Spot	Reduce	Cut back
Refer	Talk about	Reflect	Think over
Refuse	Say no	Reinforce	Make strong
Reject	Dismiss	Relocate	Move house
Rely	Count on	Remain	Stay
Remove	Chuck out	Renew	Do over
Replace	Swap out	Represent	Speak for
Request	Holler for	Require	Gotta have
Resolve	Work out	Respond	Talk back
Retain	Keep hold	Reveal	Spill the tea
Review	Recheck	Save	Hold onto
Secure	Tie up	Select	Go with
Separate	Break up	Specify	Mark down
Strengthen	Build up	Submit	Send in
Suggest	Throw out	Support	Stick by
Terminate	Drop out	Thank	Give props

Most Common Formal and Informal Words in English

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Learn Formal vs Informal Words in English

Formal	Informal	Formal	Informal
Tolerate	Put up with	Transfer	Hand off
Translate	Put in words	Transport	Ship
Understand	Catch on	Update	Fill in
Urge	Push	Utilize	Use up
Verify	Double-check	Volunteer	Pitch in
Withdraw	Pull back	Witness	See for self
Yield	Give in	Accomplish	Nail it
Accelerate	Step on it	Acquire	Pick up
Adapt	Get used to	Add	Toss in
Adjust	Fine-tune	Admire	Be into
Advise	Drop advice	Apologize	Say sorry
Appoint	Pick	Argue	Fight
Arrange	Sort	Arrive	Come over
Assist	Give a hand	Attach	Stick on
Attract	Bring in	Avoid	Dodge
Balance	Juggle	Believe	Think so
Boost	Pump up	Borrow	Take for now
Cancel	Ditch	Capture	Grab
Celebrate	Party	Change	Mix it up

Learn Formal vs Informal Words in English

English Formal vs Informal Words Vocabulary words

Formal	Informal	Formal	Informal
Choose	Pick out	Clarify	Break it down
Close	Shut down	Confirm	Say yeah
Connect	Hook up	Continue	Keep on
Convince	Talk into	Correct	Set straight
Create	Make	Damage	Mess up
Decide	Go with	Defend	Stick up
Delay	Hold up	Deliver	Drop off
Describe	Talk about	Design	Plan out
Destroy	Blow up	Discuss	Talk over
Divide	Break up	Drop	Let go
Encourage	Root for	Enter	Come in
Examine	Check over	Explain	Spell out
Explore	Check out	Fail	Mess it up
Fix	Patch	Focus	Zero in
Follow	Tag along	Forget	Space out
Gather	Pull in	Guess	Take a shot
Handle	Deal with	Happen	Go down
Help	Chip in	Hide	Cover up
Ignore	Blow off	Imagine	Dream up

English Formal vs Informal Words Vocabulary words

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