- Definitions|1
- Thesaurus|320
- Abbreviations|0
| QT(secret, hidden, unknowing, clandestine, underground) | |
| actionable | |
| against the law(expression, idiom) | |
| anarchic | |
| anarchistic | |
| artful(sneaky, covert, secretive) | |
| back door | |
| backdoor(sensitive, clandestine, underground, undisclosed, sub-rosa) | |
| black market | |
| bootleg | |
| calculating(sneaky, covert, secretive) | |
| camouflaged(secret, hidden, clandestine, underground, undisclosed) | |
| cautious(sneaky, covert, secretive) | |
| circumspect(sneaky, covert, secretive) | |
| classified(sensitive, secret, clandestine, underground, undisclosed) | |
| cloaked(secret, hidden, clandestine, sneaky, underhanded) | |
| close(clandestine, underground, undisclosed) | |
| confidential(secret, clandestine, underground, undisclosed, top-secret) | |
| conspiratorial(clandestine, underground, undisclosed, sneaky, covert) | |
| contraband |
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| APA | Smart Define. (2015). under-the-table thesaurus. Retrieved September 24, 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 24, 2026). |
| Harvard | Smart Define 2015, under-the-table thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/under-the-table/thesaurus/synonyms>. |
| MLA | Smart Define. "under-the-table thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/under-the-table/thesaurus/synonyms> |