Synonyms|190Antonyms|9|Broader|0Narrower|0Related|121

63 entries under underground topic. ×

1
masked(secret, hidden, sneaky, underhanded)
1
private(secret, hidden, clandestine, sneaky)
1
restricted(secret, clandestine, undisclosed, top-secret)
1
shrouded(secret, hidden, unknowing, clandestine)
1
sneak(clandestine, undisclosed)
1
sub rosa(expression, secret, clandestine, underhanded)
1
top secret(expression, sensitive, clandestine, undisclosed)
1
unacknowledged(sensitive, clandestine, undisclosed, sub-rosa)
1
under false pretense(expression, idiom, sensitive, clandestine)
1
unsuspected(secret, hidden, clandestine, underhanded)
0
abstruse(clandestine, undisclosed)
0
ambiguous(clandestine, undisclosed)
0
arcane(clandestine, undisclosed)
0
buried(secret, hidden, clandestine, underhanded)
0
cloak-and-dagger(secret, clandestine, undisclosed, top-secret)
0
closet(secret, clandestine, undisclosed, top-secret)
0
clouded(clandestine, undisclosed)
0
covered(clandestine, undisclosed)
0
deep(clandestine, undisclosed)
0
enigmatical(clandestine, undisclosed)
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APASmart Define. (2015). under-the-table thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/under-the-table/thesaurus/synonyms
ChicagoSmart Define. 2015. "under-the-table thesaurus" https://smartdefine.org/under-the-table/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, under-the-table thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/under-the-table/thesaurus/synonyms>.
MLASmart Define. "under-the-table thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/under-the-table/thesaurus/synonyms>