- Definitions|2
- Thesaurus|773
- Abbreviations|0
46 entries under underground topic. ×
| underhand(adjective, mean, smooth, smart, dishonest) | |
| sneak(adjective, close, clandestine, undisclosed) | |
| underhanded(adjective, dishonest, cunning, deceitful, unpredictable) | |
| conspiratorial(adjective, obscure, unknown, sneaky) | |
| arcane(adjective, obscure, strange, secret, unknown) | |
| confidential(adjective, secret, hidden, spy, clandestine) | |
| mystical(obscure, strange, unknown, clandestine) | |
| occult(obscure, strange, unknown, clandestine) | |
| unknown(obscure, strange, clandestine, curious) | |
| abstruse(obscure, strange, unknown, clandestine) | |
| backdoor(close, obscure, unknown, clandestine) | |
| classified(adjective, obscure, secret, unknown, clandestine) | |
| esoteric(obscure, strange, unknown, clandestine) | |
| in ambush(expression, close, clandestine, undisclosed) | |
| recondite(adjective, obscure, strange, unknown, clandestine) | |
| restricted(adjective, secret, clandestine, undisclosed) | |
| cloak-and-dagger(obscure, unknown, hidden, clandestine) | |
| closet(adjective, obscure, unknown, hidden, clandestine) | |
| discreet(close, clandestine, undisclosed) | |
| dissembled(close, secret, hidden, clandestine) |
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| APA | Smart Define. (2015). furtive thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/furtive/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "furtive thesaurus" https://smartdefine.org/furtive/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, furtive thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/furtive/thesaurus/synonyms>. |
| MLA | Smart Define. "furtive thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/furtive/thesaurus/synonyms> |