ATTEST TO, confirm, affirm, verify, swear to, testify to, bear out, back up, support, stick up for, corroborate, substantiate, prove, uphold, give credence to, endorse, certify, warrant, validate.
2192; headword
VOUCH FOR
Meaning of VOUCH FOR in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012