Synonyms of corroborate

corroborate

verb

kə-ˈrä-bə-ˌrāt 

1

as in to confirm

to give evidence or testimony to the truth or factualness of

the witnesses corroborated the policeman's testimony

Synonyms & Similar Words

• confirm
• verify
• argue
• support
• validate
• prove
• vindicate
• substantiate
• attest
• authenticate
• certify
• demonstrate
• bear out
• witness
• affirm
• reinforce
• establish
• testify (to)
• assert
• guarantee
• document
• vouch (for)
• declare
• back (up)
• aver
• warrant
• profess
• avouch
• avow

Antonyms & Near Antonyms

• refute
• disprove
• rebut
• contradict
• deny
• challenge
• gainsay
• question
• dispute
• contest
• disavow
• disclaim

2

as in to reinforce

to provide evidence or information for (as a claim or idea)

my personal experience does not corroborate your faith in the essential goodness of people

Synonyms & Similar Words

• reinforce
• bolster
• prove
• support
• confirm
• substantiate
• verify
• buttress
• establish
• back
• shore (up)
• validate
• affirm
• avouch

Antonyms & Near Antonyms

• undermine
• weaken
• undercut

Synonym Chooser

How does the verb corroborate contrast with its synonyms?

Some common synonyms of corroborate are authenticate, confirm, substantiate, validate, and verify. While all these words mean "to attest to the truth or validity of something," corroborate suggests the strengthening of what is already partly established.

witnesses corroborated his story

When is it sensible to use authenticate instead of corroborate?

Although the words authenticate and corroborate have much in common, authenticate implies establishing genuineness by adducing legal or official documents or expert opinion.

handwriting experts authenticated the diaries

Where would confirm be a reasonable alternative to corroborate?

The synonyms confirm and corroborate are sometimes interchangeable, but confirm implies the removing of doubts by an authoritative statement or indisputable fact.

confirmed the reports

When is substantiate a more appropriate choice than corroborate?

The meanings of substantiate and corroborate largely overlap; however, 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 corroborate?

While in some cases nearly identical to corroborate, validate implies establishing validity by authoritative affirmation or by factual proof.

validated the hypothesis by experiments

When could verify be used to replace corroborate?

In some situations, the words verify and corroborate 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

Recent Examples of corroborate

Information such as diagnostic codes, clinical encounter data, prescriptions, and hospitalizations can all be used to corroborate someone’s claim of medical frailty. — Isabella Cueto, STAT, 30 July 2026

Two senior health-ministry officials, speaking anonymously, told the magazine that at least 30,000 dead (and possibly many more) was a likelier figure, and one that was corroborated by a group of first responders who collected data surreptitiously. — James Kirchick, The Atlantic, 29 July 2026

Further corroborating Silas’ fate is the fact that also gone is Numan Acar who played his fixer Esad Kasgarli in Season 1. — Nellie Andreeva, Deadline, 29 July 2026

Those benefits are all self-described by the brand, but Hadid and tens of thousands of shoppers corroborate them. — Tamim Alnuweiri, InStyle, 28 July 2026