21
slippery(adjective, sharp, false, negative, dishonest)
20
designing(adjective, false, negative, cunning, clever)
20
canny(adjective, mean, smooth, keen, sharp)
20
furtive(adjective, honest, dishonest, cunning, deceitful)
19
dishonest(adjective, false, corrupt, cunning, deceitful)
16
double-dealing(adjective, false, corrupt, dishonest, deceitful)
16
ingenious(adjective, mean, smooth, keen, sharp)
16
smooth(adjective, mean, keen, sharp, smart)
16
treacherous(adjective, false, dishonest, cunning, deceitful)
15
subtle(adjective, mean, smooth, smart, false)
15
disingenuous(adjective, false, negative, dishonest, slick)
15
evasive(adjective, dishonest, cunning, deceitful, tricky)
15
smart(adjective, mean, smooth, keen, sharp)
14
deceptive(adjective, mean, false, dishonest, deceitful)
14
underhanded(adjective, false, dishonest, deceitful, secret)
13
Machiavellian(adjective, smooth, sharp, negative, cunning)
13
conniving(adjective, mean, smooth, negative, deceitful)
13
crooked(adjective, mean, corrupt, dishonest, cunning)
13
unscrupulous(adjective, corrupt, negative, dishonest, immoral)
12
feline(adjective, feature, characteristic, animal, trait)
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APASmart Define. (2016). sly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sly/thesaurus/synonyms
ChicagoSmart Define. 2016. "sly thesaurus" https://smartdefine.org/sly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, sly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sly/thesaurus/synonyms>.
MLASmart Define. "sly thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/sly/thesaurus/synonyms>