CONFIRM Synonyms: 94 Similar and Opposite Words

Q: How does the verb 'confirm' contrast with its synonyms?

Some common synonyms of confirm are authenticate , corroborate , substantiate , validate , and verify . While all these words mean "to attest to the truth or validity of something," confirm implies the removing of doubts by an authoritative statement or indisputable fact. // confirmed the reports

Q: When is 'authenticate' a more appropriate choice than 'confirm'?

While the synonyms authenticate and confirm are close in meaning, authenticate implies establishing genuineness by adducing legal or official documents or expert opinion. // handwriting experts authenticated the diaries

Q: When is it sensible to use 'corroborate' instead of 'confirm'?

While in some cases nearly identical to confirm , corroborate suggests the strengthening of what is already partly established. // witnesses corroborated his story

Q: When could 'substantiate' be used to replace 'confirm'?

The synonyms substantiate and confirm are sometimes interchangeable, but substantiate implies the offering of evidence that sustains the contention. // the claims have yet to be substantiated

Q: In what contexts can 'validate' take the place of 'confirm'?

The meanings of validate and confirm largely overlap; however, validate implies establishing validity by authoritative affirmation or by factual proof. // validated the hypothesis by experiments

Q: When would 'verify' be a good substitute for 'confirm'?

In some situations, the words verify and confirm are roughly equivalent. However, verify implies the establishing of correspondence of actual facts or details with those proposed or guessed at. // all statements of fact in the article have been verified

confirm

verb

kən-ˈfərm

Definition of confirm next

as in to verify

to give evidence or testimony to the truth or factualness of several eyewitnesses who can confirm the defendant's account of what happened

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in to approve

to give official acceptance of as satisfactory the senate must confirm an appointment to an ambassadorship

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How does the verb confirm contrast with its synonyms?

Some common synonyms of confirm are authenticate, corroborate, substantiate, validate, and verify. While all these words mean "to attest to the truth or validity of something," confirm implies the removing of doubts by an authoritative statement or indisputable fact.

confirmed the reports

When is authenticate a more appropriate choice than confirm?

While the synonyms authenticate and confirm are close in meaning, authenticate implies establishing genuineness by adducing legal or official documents or expert opinion.

handwriting experts authenticated the diaries

When is it sensible to use corroborate instead of confirm?

While in some cases nearly identical to confirm, corroborate suggests the strengthening of what is already partly established.

witnesses corroborated his story

When could substantiate be used to replace confirm?

The synonyms substantiate and confirm are sometimes interchangeable, but substantiate implies the offering of evidence that sustains the contention.

the claims have yet to be substantiated

In what contexts can validate take the place of confirm?

The meanings of validate and confirm largely overlap; however, validate implies establishing validity by authoritative affirmation or by factual proof.

validated the hypothesis by experiments

When would verify be a good substitute for confirm?

In some situations, the words verify and confirm are roughly equivalent. However, verify implies the establishing of correspondence of actual facts or details with those proposed or guessed at.

all statements of fact in the article have been verified

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of confirm Should the findings be confirmed, Temu could face fines of up to 6 percent of its total worldwide annual turnover. —

Jasmin Malik Chua, Sourcing Journal, 10 Feb. 2026 The Senate declined to confirm them last year amid an investigation into the Hope Florida Foundation, created by the state to support first lady Casey DeSantis’ Hope Florida program. —

Alexandra Glorioso, Miami Herald, 10 Feb. 2026 Filmmaker Zack Cregger confirmed in September that a prequel centered on Madigan’s hair-raising villain Aunt Gladys is in development. —

Erik Pedersen, Deadline, 10 Feb. 2026 Cannon resigned on Friday, a School District spokesperson confirmed. —

Angie Dimichele, Sun Sentinel, 10 Feb. 2026 See All Example Sentences for confirm

Recent Examples of Synonyms for confirm

Verb

The filing argues that custody is a nonwaivable jurisdictional requirement and that remote court proceedings would raise insurmountable problems, including the inability to verify identities, enforce perjury laws, or protect classified information.

— Kaelan Deese, The Washington Examiner, 9 Feb. 2026
Some accusations couldn't be verified, investigators wrote.

— Arkansas Online, Arkansas Online, 9 Feb. 2026

Definition of verify

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confining

confirm

confirmable

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“Confirm.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/confirm. Accessed 15 Feb. 2026.

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Last Updated: 12 Feb 2026 - Updated example sentences

Synonyms of confirm

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