12
guileful(adjective, mean, smooth, smart, honest)
12
shrewd(adjective, mean, smooth, sharp, cunning)
12
unscrupulous(adjective, mean, bad, smooth, wrong)
11
covert(adjective, mean, secret, hidden, sly)
11
evasive(adjective, dishonest, cunning, deceitful, dubious)
11
scheming(adjective, mean, smooth, dishonest, deceitful)
11
two-faced(adjective, bad, wrong, false, corrupt)
10
corrupt(adjective, bad, wrong, false, dishonest)
10
disingenuous(adjective, honest, false, dishonest, cunning)
10
double-dealing(adjective, mean, smooth, smart, false)
10
fraudulent(adjective, false, corrupt, dishonest, cunning)
10
indirect(adjective, evil, honest, false, corrupt)
10
shady(adjective, bad, wrong, false, corrupt)
10
slippery(adjective, bad, wrong, keen, sharp)
9
deceptive(adjective, mean, smooth, smart, false)
9
foxy(adjective, sharp, false, dishonest, intelligent)
9
secretive(adjective, deceitful, secret, concealment, sneaky)
8
designing(adjective, mean, smooth, smart, false)
8
false(adjective, dishonest, cunning, deceitful, lying)
8
undercover(adjective, deceitful, secret, hidden, spy)
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APASmart Define. (2015). underhand thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/underhand/thesaurus/synonyms
ChicagoSmart Define. 2015. "underhand thesaurus" https://smartdefine.org/underhand/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, underhand thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/underhand/thesaurus/synonyms>.
MLASmart Define. "underhand thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/underhand/thesaurus/synonyms>