- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
52 entries under underground topic. ×
| dark(adjective, dull, obscure, gloomy, lack) | |
| obscure(adjective, dull, dark, gloomy, uncertain) | |
| ambiguous(adjective, clear, obscure, certain, uncertain) | |
| hidden(adjective, secret, unknown, concealed) | |
| secret(adjective, unknown, hidden, clandestine) | |
| undercover(secret, unknown, hidden, concealed) | |
| mysterious(adjective, obscure, dark, secret, private) | |
| under wraps(expression, clandestine, undisclosed) | |
| camouflaged(obscure, unknown, clandestine, undisclosed) | |
| clandestine(secret, unknown, hidden, concealed) | |
| enigmatical(obscure, unknown, indefinite, equivocal, clandestine) | |
| in ambush(expression, idiom, clandestine, undisclosed) | |
| sneaky(uncertain, shaky, unclear, unlikely, questionable) | |
| surreptitious(secret, unknown, hidden, concealed) | |
| unintelligible(adjective, obscure, uncertain, doubtful, dubious) | |
| arcane(obscure, unknown, clandestine, undisclosed) | |
| backdoor(obscure, unknown, clandestine, undisclosed) | |
| backstairs(clandestine, undisclosed) | |
| classified(obscure, unknown, clandestine, undisclosed) | |
| cloak-and-dagger(obscure, unknown, clandestine, undisclosed) |
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| APA | Smart Define. (2016). clouded thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/clouded/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "clouded thesaurus" https://smartdefine.org/clouded/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, clouded thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/clouded/thesaurus/synonyms>. |
| MLA | Smart Define. "clouded thesaurus" 29 February 2016. Web. 22 September 2026. <https://smartdefine.org/clouded/thesaurus/synonyms> |