19 entries under unrevealed topic. ×
| secret(adjective, unknown, hidden, spy, concealed) | |
| cloak-and-dagger(adjective, obscure, unknown, hidden, clandestine) | |
| closet(obscure, unknown, hidden, clandestine, fraudulent) | |
| classified(obscure, unknown, clandestine, undisclosed) | |
| on the QT(expression, adjective, idiom, obscure, mysterious) | |
| ambiguous(obscure, unknown, clandestine, undisclosed) | |
| arcane(obscure, unknown, clandestine, undisclosed) | |
| backdoor(obscure, unknown, clandestine, undisclosed) | |
| camouflaged(obscure, secret, unknown, clandestine, undisclosed) | |
| conspiratorial(obscure, unknown, clandestine, undisclosed) | |
| enigmatical(obscure, unknown, clandestine, undisclosed) | |
| out-of-the-way(obscure, unknown, clandestine, undisclosed) | |
| reticent(obscure, unknown, clandestine, undisclosed) | |
| retired(obscure, unknown, clandestine, undisclosed) | |
| strange(obscure, unknown, clandestine, undisclosed) | |
| unenlightened(obscure, unknown, clandestine, undisclosed) | |
| unfrequented(obscure, unknown, clandestine, undisclosed) | |
| unintelligible(obscure, unknown, clandestine, undisclosed) | |
| unpublished(obscure, unknown, clandestine, undisclosed) |
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| APA | Smart Define. (2015). underground thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/underground/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "underground thesaurus" https://smartdefine.org/underground/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, underground thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/underground/thesaurus/synonyms>. |
| MLA | Smart Define. "underground thesaurus" 3 November 2015. Web. 29 September 2026. <https://smartdefine.org/underground/thesaurus/synonyms> |