Synonyms|488Antonyms|139|Broader|7Narrower|7Related|1.1k

49 entries under underground topic. ×

2
under wraps(expression, cover, obscure, dark, equivocal)
1
backdoor(close, obscure, unknown, inside, clandestine)
1
camouflaged(close, obscure, unknown, clandestine)
1
confidential(clandestine, undisclosed)
1
discreet(close, inside, clandestine, undisclosed)
1
dissembled(close, clandestine, undisclosed, furtive)
1
dissimulated(close, inside, clandestine, undisclosed)
1
in ambush(expression, close, inside, clandestine)
1
incognito(close, clandestine, undisclosed, furtive)
1
inside(close, clandestine, undisclosed, furtive)
1
out-of-the-way(obscure, complex, unknown, clandestine)
1
reticent(obscure, mysterious, private, unknown, taciturn)
1
retired(obscure, unknown, clandestine, undisclosed)
1
sly(dishonest, unreliable, untrustworthy, clandestine)
1
sneak(close, inside, clandestine, undisclosed)
1
sneaky(clandestine, undisclosed)
1
sub-rosa(close, clandestine, undisclosed, furtive)
1
unacknowledged(close, inside, clandestine, undisclosed)
1
under-the-table(clandestine, undisclosed)
1
under false pretense(expression, idiom, close, inside, clandestine)
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APASmart Define. (2016). cryptic thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/cryptic/thesaurus/synonyms
ChicagoSmart Define. 2016. "cryptic thesaurus" https://smartdefine.org/cryptic/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, cryptic thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/cryptic/thesaurus/synonyms>.
MLASmart Define. "cryptic thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/cryptic/thesaurus/synonyms>