Formula , abstruse, black, clamlike, confidence, conundrum, answer, and blueprint are synonyms for secret; known, public, visible, overt, open, and known about are antonyms of secret. On this page, you will find 130 another word for secret.
1. confidential
2. clandestine
3. uncommunicative
4. confidential matter
5. mystery
6. recipe
She whispered the secret to me.
They kept the secret hidden well.
His secret recipe was legendary.
The secret meeting lasted for hours.