2
knavish(adjective, dishonest, immoral, rotten, untrustworthy)
2
lowly
2
mean(adjective, bad, wrong, evil, corrupt)
2
not kosher
2
obscene(adjective, wrong, evil, corrupt, wicked)
2
perfidious(adjective, dishonest, immoral, deceitful, rotten)
2
perverse
2
scam(adjective, wrong, informal, dishonest, immoral)
2
shameful(adjective, bad, wrong, evil, dishonest)
2
shameless(adjective, bad, wrong, evil, corrupt)
2
sly(adjective, corrupt, dishonest, immoral, cunning)
2
sordid(adjective, corrupt, dishonest, crooked, greedy)
2
tainted(adjective, dishonest, immoral, rotten, untrustworthy)
2
unbecoming(adjective, wrong, rude, vulgar, immoral)
2
unclean(corrupt, wicked, depraved)
2
unfitting(adjective, immoral, improper, incompetent, ignorant)
2
unrighteous(wrong, rude, wicked, vulgar, immoral)
2
unseemly(adjective, wrong, rude, vulgar, immoral)
2
untrustworthy(adjective, dishonest, immoral, rotten, fickle)
2
vicious(adjective, bad, wrong, evil, corrupt)
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>