corroborate

1 to give evidence or testimony to the truth or factualness of the witnesses corroborated the policeman's testimony Synonyms argue, attest, authenticate, bear out, certify, confirm, substantiate, support, validate, verify, vindicateRelated Words avouch, back (up), testify (to), vouch (for), witness; guarantee, warrant; affirm, assert, aver, avow, declare, profess; demonstrate, document, establish, prove, reinforce (also reenforce)Near Antonyms contradict, gainsay; deny, disavow, disclaim; challenge, contest, dispute, questionAntonyms disprove, rebut, refute

2 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 back, bolster, buttress, support, reinforce (also reenforce), shore (up), substantiateRelated Words confirm, establish, prove, verify; affirm, avouch, validateNear Antonyms undercut, undermine, weaken