- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
67 entries under underground topic. ×
| masked(secret, hidden, clandestine, sneaky) | |
| mysterious(clandestine, undisclosed) | |
| top secret(expression, clandestine, undisclosed) | |
| unacknowledged(clandestine, undisclosed) | |
| under false pretense(expression, idiom, clandestine, undisclosed) | |
| veiled(secret, hidden, clandestine, undisclosed) | |
| QT(secret, hidden, clandestine, privy) | |
| abstruse(clandestine, undisclosed) | |
| ambiguous(false, misleading, clandestine, illusory) | |
| arcane(clandestine, undisclosed) | |
| buried(secret, hidden, clandestine, privy) | |
| cloak-and-dagger(clandestine, undisclosed) | |
| close(clandestine, undisclosed) | |
| closet(clandestine, undisclosed) | |
| clouded(clandestine, undisclosed) | |
| conspiratorial(clandestine, undisclosed, sneaky, covert) | |
| covered(clandestine, undisclosed) | |
| cryptic(clandestine, undisclosed) | |
| deep(cunning, sly, crafty, clandestine) | |
| enigmatical(clandestine, undisclosed) |
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| APA | Smart Define. (2016). underhanded thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/underhanded/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "underhanded thesaurus" https://smartdefine.org/underhanded/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, underhanded thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/underhanded/thesaurus/synonyms>. |
| MLA | Smart Define. "underhanded thesaurus" 22 January 2016. Web. 24 September 2026. <https://smartdefine.org/underhanded/thesaurus/synonyms> |