Synonyms of 'attest'

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