- Definitions|2
- Thesaurus|760
- Abbreviations|0
51 entries under underground topic. ×
| close(adjective, quiet, soft, low, restrained) | |
| secret(adjective, quiet, mean, smooth, obscure) | |
| reticent(adjective, close, quiet, soft, low) | |
| hidden(adjective, quiet, obscure, plain, strange) | |
| dark(adjective, close, strange, reticent, clandestine) | |
| discreet(adjective, close, quiet, soft, low) | |
| confidential(adjective, restricted, clandestine, discreet) | |
| mysterious(adjective, strange, secret, private, reticent) | |
| retired(adjective, quiet, humble, distant, minor) | |
| classified(clandestine, undisclosed) | |
| enigmatical(adjective, strange, clandestine, undisclosed) | |
| hush-hush(adjective, quiet, dishonest, cunning, deceitful) | |
| secluded(adjective, quiet, humble, distant, minor) | |
| abstruse(strange, unknown, clandestine, curious) | |
| arcane(strange, clandestine, undisclosed, inexplicable) | |
| backdoor(clandestine, undisclosed) | |
| conspiratorial(adjective, clandestine, undisclosed, sneaky) | |
| covered(clandestine, undisclosed) | |
| disguised(adjective, clandestine, undisclosed, sneaky) | |
| dissembled(restricted, clandestine, discreet, undisclosed) |
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| APA | Smart Define. (2015). secretive thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/secretive/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "secretive thesaurus" https://smartdefine.org/secretive/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, secretive thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/secretive/thesaurus/synonyms>. |
| MLA | Smart Define. "secretive thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/secretive/thesaurus/synonyms> |