| Main Entry: | |
| Part of Speech: | noun |
| Definition: | secret word given for entry |
| Synonyms: | countersign, identification, key, key word, open sesame, parole, phrase, signal, ticket, watchword, word |
| Main Entry: | key |
| Part of Speech: | noun |
| Definition: | answer, solution |
| Synonyms: | blueprint, brand, cipher, clue, code, core, crux, cue, earmark, explanation, fulcrum, guide, hinge, index, indicator, interpretation, lead, lever, marker, means, nexus, nucleus, passport, password, pivot, pointer, root, sign, symptom, ticket, translation |
| Antonyms: | question |
| Main Entry: | secret |
| Part of Speech: | noun |
| Definition: | something kept hidden, unrevealed |
| Synonyms: | cipher, classified information, code, confidence, confidential information, enigma, formula, key, magic number, mystery, occult, oracle, password, privileged information, puzzle, skeleton in cupboard, unknown |
| Antonyms: | known, public knowledge, revelation |
| Main Entry: | ticket |
| Part of Speech: | noun |
| Definition: | authorization on paper |
| Synonyms: | admission, badge, board, card, certificate, check, chit, coupon, credential, docket, document, invite, key, label, license, marker, note, notice, open sesame, paper, pass, passage, passport, password, permit, raincheck, receipt, record, slip, sticker, stub, tab, tag, token, voucher |
| Main Entry: | code word |
| Part of Speech: | noun |
| Definition: | secret word |
| Synonyms: | code book, code name, euphemism, password, secret language, secret message, secret writing, watchword |
| Main Entry: | open sesame |
| Part of Speech: | noun |
| Definition: | magic words for entry |
| Synonyms: | abracadabra, abraxas, access, key, keyword, magic formula, opener, password, paternoster, secret sign, watchword |
| Main Entry: | countersign |
| Part of Speech: | verb |
| Definition: | endorse |
| Synonyms: | authorize, certify, confirm, corroborate, mark, password, seal, sign, signature, watchword |
| Main Entry: | watchword |
| Part of Speech: | noun |
| Definition: | motto |
| Synonyms: | countersign, cry, parole, password, shibboleth, sign, signal, slogan |
| Main Entry: | shibboleth |
| Part of Speech: | noun |
| Definition: | slogan |
| Synonyms: | catchword, custom, party cry, password, phrase, practice, saying, truism, watchword |