60 entries under undisclosed topic. ×
| mysterious(obscure, unknown, clandestine, underground) | |
| recondite(obscure, unknown, clandestine, underground) | |
| unenlightened(obscure, deep, unknown, clandestine, underground) | |
| unknown(obscure, clandestine, underground, unrevealed) | |
| unpublished(obscure, deep, unknown, clandestine, underground) | |
| unseen(obscure, unknown, clandestine, underground) | |
| ambiguous(obscure, deep, unknown, clandestine, underground) | |
| backstairs(clandestine, underground) | |
| camouflaged(obscure, unknown, clandestine, underground) | |
| classified(obscure, unknown, personal, clandestine, underground) | |
| cloak-and-dagger(obscure, unknown, clandestine, underground) | |
| clouded(obscure, unknown, clandestine, underground) | |
| conspiratorial(obscure, unknown, clandestine, underground) | |
| discreet(personal, clandestine, underground, confidential) | |
| dissembled(clandestine, underground) | |
| dissimulated(clandestine, underground) | |
| in ambush(expression, clandestine, underground) | |
| inside(personal, clandestine, underground, confidential) | |
| mystic(obscure, unknown, clandestine, underground) | |
| mystical(obscure, unknown, clandestine, underground) |
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| APA | Smart Define. (2015). retired thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/retired/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "retired thesaurus" https://smartdefine.org/retired/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, retired thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/retired/thesaurus/synonyms>. |
| MLA | Smart Define. "retired thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/retired/thesaurus/synonyms> |