3
treacherous(adjective, low, dishonest, immoral, cunning)
3
two-faced(adjective, bad, wrong, corrupt, dishonest)
3
underhanded(adjective, corrupt, dishonest, immoral, cunning)
3
unjust(adjective, rude, wicked, dishonest, immoral)
3
unlawful(adjective, wicked, dishonest, immoral, unwarranted)
3
unsavory
3
wrongful(adjective, wrong, evil, rude, wicked)
2
baseborn
2
cunning(adjective, dishonest, deceitful, sneaky, underhanded)
2
debased
2
decadent(corrupt, wicked, depraved)
2
degenerate(adjective, wrong, corrupt, wicked, depraved)
2
faithless(adjective, dishonest, immoral, rotten, fickle)
2
false
2
foul(adjective, bad, wrong, evil, dishonest)
2
fraudulent(adjective, corrupt, dishonest, immoral, cunning)
2
illegitimate
2
indirect(dishonest, cunning, deceitful, crooked, sneaky)
2
inequitable(adjective, dishonest, immoral, unwarranted, dishonorable)
2
inglorious
11 years ago|14k views|share |citing 
APASmart Define. (2015). unethical thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unethical/thesaurus/synonyms
ChicagoSmart Define. 2015. "unethical thesaurus" https://smartdefine.org/unethical/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unethical thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unethical/thesaurus/synonyms>.
MLASmart Define. "unethical thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/unethical/thesaurus/synonyms>