5
iniquitous(adjective, evil, corrupt, wicked, dishonest)
5
insidious(adjective, mean, smooth, dishonest, cunning)
5
mean(verb, adjective, bad, smooth, evil)
5
rotten(adjective, hard, evil, rough, nasty)
5
scandalous(adjective, corrupt, wicked, dishonest, immoral)
5
shrewd(adjective, mean, smooth, negative, cunning)
5
unconscientious(adjective, immoral, improbity)
5
vile(adjective, hard, evil, rough, nasty)
4
Machiavellian(adjective, negative, wicked, scheming, bad behavior)
4
calculating(adjective, mean, smooth, negative, cunning)
4
degenerate(adjective, corrupt, wicked, depraved, perverted)
4
degrading(adjective, immoral, perverted)
4
designing(adjective, mean, smooth, smart, false)
4
despicable(adjective, hard, evil, rough, nasty)
4
disloyal(adjective, mean, bad, evil, base)
4
double-dealing(adjective, mean, smooth, smart, base)
4
fishy(wrong, dishonest, immoral, crooked, unprincipled)
4
foxy(adjective, mean, smooth, negative, cunning)
4
illegal(adjective, bad, wrong, corrupt, dishonest)
4
insincere(adjective, false, dishonest, deceitful, lying)
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APASmart Define. (2016). unscrupulous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unscrupulous/thesaurus/synonyms
ChicagoSmart Define. 2016. "unscrupulous thesaurus" https://smartdefine.org/unscrupulous/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, unscrupulous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unscrupulous/thesaurus/synonyms>.
MLASmart Define. "unscrupulous thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/unscrupulous/thesaurus/synonyms>