43 entries under underground topic. ×

1
sub rosa(expression, adjective, secret, clandestine)
1
underhand(secret, hidden, clandestine, sneaky)
1
underhanded(secret, hidden, clandestine, sneaky)
1
unsuspected(secret, hidden, clandestine, underhanded)
0
ambiguous(obscure, unknown, clandestine, undisclosed)
0
arcane(obscure, unknown, clandestine, undisclosed)
0
cloak-and-dagger(clandestine, undisclosed)
0
closet(clandestine, undisclosed)
0
deep(obscure, unknown, clandestine, undisclosed)
0
enigmatical(obscure, unknown, clandestine, undisclosed)
0
out-of-the-way(obscure, unknown, clandestine, undisclosed)
0
privy(secret, hidden, clandestine, underhanded)
0
restricted(clandestine, undisclosed)
0
reticent(obscure, unknown, clandestine, undisclosed)
0
strange(obscure, unknown, clandestine, undisclosed)
0
top-secret(clandestine, undisclosed)
0
top secret(expression, clandestine, undisclosed)
0
unacknowledged(clandestine, undisclosed)
0
under false pretense(expression, idiom, clandestine, undisclosed)
0
unenlightened(obscure, unknown, clandestine, undisclosed)
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APASmart Define. (2015). disguised thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/disguised/thesaurus/synonyms
ChicagoSmart Define. 2015. "disguised thesaurus" https://smartdefine.org/disguised/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, disguised thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/disguised/thesaurus/synonyms>.
MLASmart Define. "disguised thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/disguised/thesaurus/synonyms>