- Definitions|2
- Thesaurus|862
- Abbreviations|0
44 entries under underground topic. ×
| backdoor(obscure, unknown, clandestine, undisclosed) | |
| backstairs(clandestine, undisclosed) | |
| classified(obscure, unknown, clandestine, undisclosed) | |
| cloak-and-dagger(obscure, unknown, clandestine, undisclosed) | |
| closet(obscure, unknown, clandestine, undisclosed) | |
| confidential(clandestine, undisclosed) | |
| conspiratorial(obscure, unknown, clandestine, undisclosed) | |
| discreet(clandestine, undisclosed) | |
| dissimulated(clandestine, undisclosed) | |
| in ambush(expression, clandestine, undisclosed) | |
| inside(clandestine, undisclosed) | |
| out-of-the-way(obscure, unknown, clandestine, undisclosed) | |
| restricted(clandestine, undisclosed) | |
| reticent(obscure, unknown, clandestine, undisclosed) | |
| retired(obscure, unknown, clandestine, undisclosed) | |
| sub-rosa(secret, private, hidden, sneaky) | |
| top-secret(clandestine, undisclosed) | |
| top secret(expression, clandestine, undisclosed) | |
| unacknowledged(clandestine, undisclosed) | |
| under false pretense(expression, idiom, clandestine, undisclosed) |
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| APA | Smart Define. (2016). veiled thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/veiled/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "veiled thesaurus" https://smartdefine.org/veiled/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, veiled thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/veiled/thesaurus/synonyms>. |
| MLA | Smart Define. "veiled thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/veiled/thesaurus/synonyms> |