2
deceive(verb, slip, hide, steal, evade)
2
demon
2
devilish
2
dicey
2
discerning(adjective, smooth, keen, sharp, smart)
2
dishonorable(adjective, mean, smooth, corrupt, dishonest)
2
dishonourable(adjective, faithless)
2
evil
2
funny(adjective, witty)
2
guarded(cautious, shrewd, suspicious, wary, watchful)
2
hidden(adjective, cunning, secret, private, clandestine)
2
hole-and-corner(secret, private, hidden, sneaky, covert)
2
immoral(adjective, corrupt, dishonest, unprincipled)
2
lurk
2
naughty
2
nimble(smart, bright, intelligent, handy, adroit)
2
on the sly(expression, idiom, cunning, secret, private)
2
pat
2
perceptive(adjective, smooth, keen, sharp, smart)
2
perspicacious(adjective, keen, sharp, smart, intelligent)
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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>