52 entries under unknown topic. ×

19
covert(adjective, secret, reticent, sly)
7
mysterious(adjective, obscure, strange, secret, private)
6
conspiratorial(adjective, obscure, underground, sneaky)
6
private(adjective, obscure, secret, hidden)
5
underground(adjective, obscure, secret, hidden)
3
arcane(adjective, obscure, strange, secret)
3
mystical(obscure, strange, clandestine, underground)
3
occult(obscure, strange, clandestine, underground)
2
abstruse(obscure, strange, clandestine, underground)
2
alchemistic(strange, curious, concealed, inexplicable)
2
astrological(strange, curious, concealed, inexplicable)
2
backdoor(close, obscure, clandestine, underground)
2
classified(adjective, obscure, secret, clandestine)
2
esoteric(obscure, strange, clandestine, underground)
2
recondite(adjective, obscure, strange, clandestine)
1
camouflaged(close, obscure, secret, hidden)
1
cloak-and-dagger(obscure, hidden, clandestine, underground)
1
closet(adjective, obscure, hidden, clandestine)
1
curious(strange, concealed, inexplicable, unexplained)
1
enigmatic(adjective, strange, mysterious, reticent)
<123>
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APASmart Define. (2015). furtive thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/furtive/thesaurus/synonyms
ChicagoSmart Define. 2015. "furtive thesaurus" https://smartdefine.org/furtive/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, furtive thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/furtive/thesaurus/synonyms>.
MLASmart Define. "furtive thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/furtive/thesaurus/synonyms>