83 entries under hidden topic. ×

1
obscured(adjective, secret, clandestine, underground)
1
out of view(expression, idiom, secret, unknown)
1
screened(close, quiet, secret, unknown, isolated)
1
skulking(adjective, secret, sneak, sneaky)
1
sub-rosa(secret, spy, underground, sneak)
1
under-the-table(secret, clandestine, underground, sneaky)
1
under wraps(expression, secret, clandestine, underground)
1
unknown(obscure, secret, immense, concealed)
1
unseen(adjective, obscure, secret, unknown)
0
cloak and dagger(expression, idiom, fraudulent)
0
creep(secret, spy, covert)
0
foxy
0
illegitimate
0
illicit
0
in holes and corners(expression, idiom, fraudulent)
0
intelligence(secret, spy, covert)
0
on the quiet(expression, idiom, fraudulent)
0
slinking(secret, sneak, sneaky, covert)
0
spy(secret, covert)
0
stealth(secret, spy, covert)
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APASmart Define. (2016). private thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/private/thesaurus/synonyms
ChicagoSmart Define. 2016. "private thesaurus" https://smartdefine.org/private/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, private thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/private/thesaurus/synonyms>.
MLASmart Define. "private thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/private/thesaurus/synonyms>