Synonyms and related words :
OK, accept, accredit, affirm, amen, approve, assay, attest, audit, authenticate, authorize, autograph, back, back up, bear out, bolster, bring to test, buttress, certificate, certify, charter, check, check and doublecheck, check out, check over, circumstantiate, collate, confirm, constitute, corroborate, cosign, countersign, cross-check, cut and try, declare lawful, decree, document, double-check, empower, enable, enact, endorse, enfranchise, entitle, essay, establish, experiment, formulate, fortify, franchise, give a try, give a tryout, give official sanction, give permission, give power, give the go-ahead, give the imprimatur, give thumbs up, have a go, initial, justify, legalize, legislate, legitimate, legitimatize, legitimize, license, make a regulation, make legal, notarize, ordain, pass, pass on, pass upon, patent, permit, play around with, practice upon, prescribe, privilege, probate, prove, put in force, put to trial, ratify, recheck, regulate, reinforce, research, road-test, rubber stamp, rubber-stamp, run a sample, sample, sanction, say amen to, seal, second, shake down, sign, sign and seal, strengthen, subscribe to, substantiate, support, sustain, swear and affirm, swear to, taste, test, triple-check, try, try it on, try out, undergird, undersign, underwrite, uphold, verify, visa, vise, warrant