85 entries under clandestine topic. ×

13
underhand(adjective, honest, false, dishonest, cunning)
10
crafty(adjective, false, dishonest, cunning, deceitful)
10
wily(adjective, false, dishonest, cunning, deceitful)
9
sneaky(adjective, honest, false, corrupt, dishonest)
8
cunning(adjective, false, dishonest, deceitful, lying)
8
furtive(adjective, dishonest, cunning, deceitful, unpredictable)
8
guileful(adjective, honest, false, dishonest, cunning)
8
shifty(adjective, honest, false, corrupt, dishonest)
8
tricky(adjective, false, dishonest, cunning, deceitful)
7
covert(adjective, dishonest, deceitful, secret)
7
secret(adjective, dishonest, cunning, deceitful)
7
surreptitious(adjective, dishonest, deceitful, crafty)
6
stealthy(adjective, dishonest, cunning, deceitful)
6
undercover(dishonest, cunning, deceitful, secret, hidden)
5
backstairs(underground, undisclosed)
4
underground(secret, undisclosed)
2
classified(underground, undisclosed)
2
confidential(underground, undisclosed)
2
private(secret, hidden, underground, undisclosed)
2
secretive(adjective, corrupt, dishonest, deceitful, secret)
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APASmart Define. (2016). underhanded thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/underhanded/thesaurus/synonyms
ChicagoSmart Define. 2016. "underhanded thesaurus" https://smartdefine.org/underhanded/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, underhanded thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/underhanded/thesaurus/synonyms>.
MLASmart Define. "underhanded thesaurus" 22 January 2016. Web. 24 September 2026. <https://smartdefine.org/underhanded/thesaurus/synonyms>