Synonyms of 'countersign'

accept, accredit, affirm, Amen, approve, assure, authenticate, authorize, autograph, avouch, badge, card, certify, christcross, cipher, confirm, Cross, device, guarantee, Hand, identification, identification tag, initial, mark, notarize, open sesame, pass, permit, plight, promise, ratify, rubber stamp, sanction, seal, second, shibboleth, sign, signature, signet, support, swear, visa, vouch, warrant, watchword, word, x, validate, underwrite, troth, token, tessera, subscription, sign manual, pledge, password, monogram, John Hancock, endorsement, endorse, dog tag, countersignature, calling card, vise, vow