THESAURUS
authenticate
OK, accept, accredit, affirm, amen, approve, attest, authorize, autograph, avouch, back, back up, bear out, bolster, buttress, certify, circumstantiate, confirm, corroborate, cosign, countersign, demonstrate, document, endorse, fortify, give permission, give the go-ahead, give the imprimatur, give thumbs up, initial, justify, notarize, pass, pass on, pass upon, permit, probate, prove, ratify, reinforce, rubber stamp, sanction, say amen to, seal, second, sign, sign and seal, strengthen, subscribe to, substantiate, support, sustain, swear and affirm, swear to, test, try, undergird, undersign, underwrite, uphold, validate, verify, visa, vise, vouch for, warrant
ROGET THESAURUS
authenticate
Evidence
VB
be evidence, evince, show, betoken, tell of, indicate, imply, involve, argue, bespeak, breathe, have weight, carry weight, tell, speak volumes, speak for itself, rest upon, depend upon, repose on, bear witness, give evidence, testify, depose, witness, vouch for, sign, seal, undersign, set one's hand and seal, sign and seal, deliver as one's act and deed, certify, attest, acknowledge, make absolute, confirm, prove (demonstrate), indorse, countersign, corroborate, support, ratify, bear out, uphold, warrant, adduce, attest, cite, quote, refer to, appeal to, call, call to witness, bring forward, bring into court, allege, plead, produce witnesses, confront witnesses, place into evidence, mark into evidence, collect evidence, bring together evidence, rake up evidence, experiment, have a case, make out a case, establish,
authenticate, substantiate, verify, make good, quote chapter and verse, bring home to, bring to book.