Synonyms|381Antonyms|51|Broader|6Narrower|1Related|341

66 entries under underground topic. ×

2
stealthy(adjective, secret, clandestine, undisclosed)
2
surreptitious(secret, clandestine, undisclosed, top-secret)
2
underhanded(clandestine, undisclosed)
2
unrevealed(obscure, unknown, clandestine, undisclosed)
1
backstairs(sensitive, clandestine, undisclosed, sub-rosa)
1
camouflaged(obscure, unknown, clandestine, undisclosed)
1
discreet(personal, clandestine, undisclosed, confidential)
1
disguised(obscure, unknown, clandestine, undisclosed)
1
dissembled(clandestine, undisclosed)
1
dissimulated(clandestine, undisclosed)
1
in ambush(expression, sensitive, clandestine, undisclosed)
1
sly(clandestine, undisclosed)
1
sneak(clandestine, undisclosed)
1
sneaky(clandestine, undisclosed)
1
sub-rosa(sensitive, secret, clandestine, undisclosed)
1
unacknowledged(sensitive, clandestine, undisclosed, sub-rosa)
1
under-the-table(sensitive, secret, clandestine, undisclosed)
1
under false pretense(expression, idiom, sensitive, clandestine)
1
unpublished(adjective, obscure, unknown, clandestine)
0
abstruse(obscure, unknown, clandestine, undisclosed)
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APASmart Define. (2015). classified thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/classified/thesaurus/synonyms
ChicagoSmart Define. 2015. "classified thesaurus" https://smartdefine.org/classified/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, classified thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/classified/thesaurus/synonyms>.
MLASmart Define. "classified thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/classified/thesaurus/synonyms>