Synonyms and related words :
ID card, John Hancock, OK, X, accept, accredit, affirm, amen, approve, assure, authenticate, authorize, autograph, avouch, badge, calligram, calling card, card, certify, christcross, cipher, confirm, cosign, countermark, countersignature, counterstamp, credentials, cross, device, dog tag, endorse, endorsement, give permission, give the go-ahead, give the imprimatur, give thumbs up, guarantee, hand, identification, identification badge, identification tag, initial, initials, letter of introduction, make a promise, mark, mark of signature, monogram, notarize, open sesame, pass, pass on, pass upon, password, permit, pledge, plight, press card, promise, ratify, rubber stamp, sanction, say amen to, seal, second, secret grip, serial number, shibboleth, sigil, sign, sign and seal, sign manual, signature, signet, subscribe to, subscription, support, swear, swear and affirm, swear to, tessera, token, troth, undersign, underwrite, validate, visa, vise, visiting card, vouch, vow, warrant, watchword, word,