Synonyms|540Antonyms|121|Broader|7Narrower|4Related|1.1k

56 entries under underground topic. ×

1
retired(obscure, unknown, clandestine, undisclosed)
1
secretive(strange, unknown, clandestine, curious)
1
strange(obscure, unknown, clandestine, undisclosed)
1
surreptitious(secret, unknown, hidden, concealed)
0
backdoor(obscure, unknown, clandestine, undisclosed)
0
backstairs(clandestine, undisclosed)
0
camouflaged(obscure, unknown, clandestine, undisclosed)
0
classified(obscure, unknown, clandestine, undisclosed)
0
cloak-and-dagger(obscure, unknown, clandestine, undisclosed)
0
closet(obscure, unknown, clandestine, undisclosed)
0
confidential(clandestine, undisclosed)
0
conspiratorial(obscure, unknown, clandestine, undisclosed)
0
discreet(clandestine, undisclosed)
0
dissembled(clandestine, undisclosed)
0
dissimulated(clandestine, undisclosed)
0
hush-hush(clandestine, undisclosed)
0
in ambush(expression, clandestine, undisclosed)
0
incognito(clandestine, undisclosed)
0
inside(clandestine, undisclosed)
0
on the QT(expression, idiom, obscure, unknown, clandestine)
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APASmart Define. (2015). abstruse thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/abstruse/thesaurus/synonyms
ChicagoSmart Define. 2015. "abstruse thesaurus" https://smartdefine.org/abstruse/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, abstruse thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/abstruse/thesaurus/synonyms>.
MLASmart Define. "abstruse thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/abstruse/thesaurus/synonyms>