52 entries under unknown topic. ×
| classified(obscure, clandestine, underground, undisclosed) | |
| cloak-and-dagger(obscure, clandestine, underground, undisclosed) | |
| cloak and dagger(expression, idiom, obscure, unrevealed) | |
| closet(obscure, clandestine, underground, undisclosed) | |
| conspiratorial(obscure, clandestine, underground, undisclosed) | |
| enigmatical(obscure, clandestine, underground, undisclosed) | |
| furtive(obscure, clandestine, underground, undisclosed) | |
| strange(obscure, clandestine, underground, undisclosed) | |
| unenlightened(obscure, clandestine, underground, undisclosed) | |
| unfrequented(obscure, clandestine, underground, undisclosed) | |
| unintelligible(obscure, clandestine, underground, undisclosed) | |
| unpublished(obscure, clandestine, underground, undisclosed) |
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| APA | Smart Define. (2015). covered thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/covered/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "covered thesaurus" https://smartdefine.org/covered/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, covered thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/covered/thesaurus/synonyms>. |
| MLA | Smart Define. "covered thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/covered/thesaurus/synonyms> |