3
unprincipled(adjective, corrupt, dishonest, immoral, deceitful)
3
untruthful(adjective, false, dishonest, deceitful, dubious)
3
waggish(adjective, playful, witty, mischievous)
3
wicked
3
wise(adjective, smooth, keen, sharp, smart)
2
Janus-faced
2
ambidextrous(false, dishonest, deceitful, slick, hypocritical)
2
art(noun, cunning)
2
artificial(adjective, cunning)
2
bluffing(adjective, mean, smooth, cunning, clever)
2
captious(adjective, mean, smooth, cunning, clever)
2
catchy(adjective, false, misleading, illusory)
2
catty
2
cautious(smart, clever, subtle, artful, sneaky)
2
chanceful
2
cheat(noun, verb, slip, hide, steal)
2
close(clandestine, underground, undisclosed, concealment)
2
corrupt(adjective, dishonest, immoral, unprincipled)
2
cunningly(adverb, cunning)
2
cynical(adjective, sharp, ironic, deadpan, understated)
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APASmart Define. (2016). sly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sly/thesaurus/synonyms
ChicagoSmart Define. 2016. "sly thesaurus" https://smartdefine.org/sly/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, sly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sly/thesaurus/synonyms>.
MLASmart Define. "sly thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/sly/thesaurus/synonyms>