- Definitions|1
- Thesaurus|320
- Abbreviations|0
63 entries under underground topic. ×
| backstairs(sensitive, unknowing, clandestine, undisclosed) | |
| clandestine(secret, private, hidden, sneaky) | |
| privy(secret, hidden, clandestine, underhanded) | |
| sneaky(secret, private, hidden, clandestine) | |
| underhanded(secret, hidden, clandestine, sneaky) | |
| QT(secret, hidden, unknowing, clandestine) | |
| backdoor(sensitive, clandestine, undisclosed, sub-rosa) | |
| camouflaged(secret, hidden, clandestine, undisclosed) | |
| classified(sensitive, secret, clandestine, undisclosed) | |
| close(clandestine, undisclosed) | |
| confidential(secret, clandestine, undisclosed, top-secret) | |
| conspiratorial(clandestine, undisclosed, sneaky, covert) | |
| cryptic(clandestine, undisclosed) | |
| discreet(clandestine, undisclosed) | |
| dissembled(secret, hidden, clandestine, undisclosed) | |
| dissimulated(clandestine, undisclosed) | |
| in ambush(expression, sensitive, clandestine, undisclosed) | |
| incog(secret, hidden, clandestine, underhanded) | |
| incognito(secret, hidden, clandestine, undisclosed) | |
| inside(clandestine, undisclosed) |
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| APA | Smart Define. (2015). under-the-table thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/under-the-table/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "under-the-table thesaurus" https://smartdefine.org/under-the-table/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, under-the-table thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/under-the-table/thesaurus/synonyms>. |
| MLA | Smart Define. "under-the-table thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/under-the-table/thesaurus/synonyms> |