Synonyms of 'attest'

acknowledge, approve, argue, assert, assure, back, bear out, bolster, book, confirm, corroborate, declare, denote, depone, depose, disclose, document, ensure, evidence, express, guarantee, guaranty, illustrate, indicate, insure, involve, mark, probate, ratify, reinforce, secure, set forth, show, sign, signalize, signify, sponsor, substantiate, suggest, support, sustain, tell, undergird, underwrite, validate, verify, warrant, witness, uphold, testify, swear, strengthen, prove, manifest, imply, fortify, exhibit, evince, endorse, display, demonstrate, connote, circumstantiate, certify, buttress, breathe, bond, betoken, bespeak, avow, avouch, aver, authenticate, asseverate, announce, allege, affirm, vow, vouchsafe, vouch