57 entries under underground topic. ×
| undisclosed(adjective, obscure, unknown, personal, clandestine) | |
| abstruse(obscure, unknown, clandestine, undisclosed) | |
| ambiguous(obscure, unknown, clandestine, undisclosed) | |
| backdoor(obscure, intimate, private, unknown, clandestine) | |
| camouflaged(obscure, unknown, clandestine, undisclosed) | |
| clouded(obscure, unknown, clandestine, undisclosed) | |
| conspiratorial(obscure, unknown, clandestine, undisclosed) | |
| covered(obscure, unknown, clandestine, undisclosed) | |
| deep(obscure, unknown, clandestine, undisclosed) | |
| discreet(special, intimate, personal, clandestine) | |
| disguised(clandestine, undisclosed) | |
| dissembled(clandestine, undisclosed) | |
| dissimulated(clandestine, undisclosed) | |
| enigmatical(obscure, unknown, clandestine, undisclosed) | |
| in ambush(expression, clandestine, undisclosed) | |
| mysterious(obscure, unknown, clandestine, undisclosed) | |
| mystic(obscure, unknown, clandestine, undisclosed) | |
| mystical(obscure, unknown, clandestine, undisclosed) | |
| occult(obscure, unknown, clandestine, undisclosed) | |
| on the QT(expression, idiom, obscure, unknown, clandestine) |
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| APA | Smart Define. (2015). closet thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/closet/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "closet thesaurus" https://smartdefine.org/closet/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, closet thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/closet/thesaurus/synonyms>. |
| MLA | Smart Define. "closet thesaurus" 30 September 2015. Web. 26 September 2026. <https://smartdefine.org/closet/thesaurus/synonyms> |