Synonymes secret (anglais)

Nom
- enigma : mystery, puzzle, code, concealment, confidence, oracle, occult

Adjectif
- property : private, classified, privy, secretive, reticent, retired, secluded
- property : hidden, concealed, clandestine, covert, arcane, cryptic, shrouded, veiled
- property : mysterious, unknown, strange, enigmatic, esoteric, mystic, mystical, occult