83 entries under hidden topic. ×
| disguised(secret, unknown, clandestine, concealed) | |
| out-of-the-way(close, quiet, obscure, remote, unknown) | |
| shrouded(adjective, obscure, secret, unknown) | |
| sly(adjective, secret, clandestine, underground) | |
| sneaky(adjective, secret, clandestine, underground) | |
| unauthorized(adjective, secret, sneaky, covert) | |
| underhanded(secret, clandestine, underground, undisclosed) | |
| QT(secret, unknown, isolated, clandestine) | |
| buried(secret, unknown, concealed, underhanded) | |
| camouflaged(obscure, secret, unknown, clandestine) | |
| cloak-and-dagger(obscure, secret, unknown, clandestine) | |
| clouded(obscure, secret, unknown, concealed) | |
| covered(obscure, secret, unknown, underground) | |
| dissembled(secret, clandestine, underground, undisclosed) | |
| fraudulent(secret, sneaky, covert) | |
| hermetic(close, quiet, secret, unknown, isolated) | |
| hermetical(secret, unknown, isolated, concealed) | |
| hole-and-corner(secret, spy, sneaky, covert) | |
| imperceivable(secret, unknown, isolated, concealed) | |
| in the dark(expression, idiom, mysterious, reticent, unknown) |
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| APA | Smart Define. (2016). private thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/private/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "private thesaurus" https://smartdefine.org/private/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, private thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/private/thesaurus/synonyms>. |
| MLA | Smart Define. "private thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/private/thesaurus/synonyms> |