83 entries under hidden topic. ×
| obscured(adjective, secret, clandestine, underground) | |
| out of view(expression, idiom, secret, unknown) | |
| screened(close, quiet, secret, unknown, isolated) | |
| skulking(adjective, secret, sneak, sneaky) | |
| sub-rosa(secret, spy, underground, sneak) | |
| under-the-table(secret, clandestine, underground, sneaky) | |
| under wraps(expression, secret, clandestine, underground) | |
| unknown(obscure, secret, immense, concealed) | |
| unseen(adjective, obscure, secret, unknown) | |
| cloak and dagger(expression, idiom, fraudulent) | |
| creep(secret, spy, covert) | |
| foxy | |
| illegitimate | |
| illicit | |
| in holes and corners(expression, idiom, fraudulent) | |
| intelligence(secret, spy, covert) | |
| on the quiet(expression, idiom, fraudulent) | |
| slinking(secret, sneak, sneaky, covert) | |
| spy(secret, covert) | |
| stealth(secret, spy, covert) |
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| APA | Smart Define. (2016). private thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/private/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "private thesaurus" https://smartdefine.org/private/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, private thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/private/thesaurus/synonyms>. |
| MLA | Smart Define. "private thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/private/thesaurus/synonyms> |