Pocket Thesaurus
Synonyms of vouch
act as a witness, affirm, answer for, assert, asseverate, assure, attest to, avert, avow, back, be responsible for, bear testimony, certify, confirm, contend, corroborate, cosign, declare, get behind, give an affidavit, guarantee, maintain, okay, predicate, profess, prove, put forth, rubber-stamp, say so, sign for, sponsor, stand up for, substantiate, support, swear to, swear up and down, testify, uphold, verify, vow, warrant, witness
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