- Definitions|1
- Thesaurus|593
- Abbreviations|0
71 entries under underground topic. ×
| dark(adjective, obscure, mysterious, private, unknown) | |
| secret(adjective, hidden, clandestine, undisclosed) | |
| backdoor(obscure, deep, unknown, clandestine) | |
| enigmatical(obscure, deep, unknown, clandestine) | |
| out-of-the-way(obscure, deep, unknown, clandestine) | |
| reticent(obscure, deep, unknown, clandestine) | |
| retired(obscure, deep, unknown, clandestine) | |
| unfrequented(obscure, deep, unknown, clandestine) | |
| unpublished(obscure, deep, unknown, clandestine) | |
| abstruse(obscure, unknown, clandestine, undisclosed) | |
| ambiguous(obscure, deep, unknown, clandestine) | |
| arcane(obscure, deep, unknown, clandestine) | |
| backstairs(clandestine, undisclosed) | |
| camouflaged(obscure, unknown, clandestine, undisclosed) | |
| clandestine | |
| classified(obscure, unknown, clandestine, undisclosed) | |
| cloak-and-dagger(obscure, unknown, clandestine, undisclosed) | |
| close(obscure, unknown, clandestine, undisclosed) | |
| closet(obscure, unknown, clandestine, undisclosed) | |
| clouded(obscure, unknown, clandestine, undisclosed) |
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| APA | Smart Define. (2015). unenlightened thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unenlightened/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unenlightened thesaurus" https://smartdefine.org/unenlightened/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, unenlightened thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unenlightened/thesaurus/synonyms>. |
| MLA | Smart Define. "unenlightened thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unenlightened/thesaurus/synonyms> |