8
unprofessional(adjective, wrong, corrupt, dishonest, immoral)
7
amoral(adjective, bad, wrong, evil, corrupt)
7
base(adjective, bad, wrong, evil, corrupt)
7
slippery(adjective, wrong, informal, corrupt, dishonest)
6
improper(adjective, wrong, rude, corrupt, vulgar)
6
iniquitous(adjective, bad, wrong, evil, corrupt)
6
sharp(adjective, wrong, informal, dishonest, immoral)
6
underhand(adjective, wrong, corrupt, dishonest, immoral)
5
criminal(adjective, wicked, dishonest, immoral, shocking)
5
devious(adjective, corrupt, dishonest, immoral, cunning)
5
fishy(adjective, wrong, dishonest, immoral, crooked)
5
shifty(adjective, corrupt, dishonest, cunning, deceitful)
4
mercenary(adjective, bad, wrong, dishonest, immoral)
4
bad(adjective, wrong, evil, dirty, corrupt)
4
dirty(adjective, bad, wrong, informal, rude)
4
lawless
4
reprobate(adjective, bad, wrong, evil, corrupt)
4
rotten(adjective, bad, wrong, evil, dishonest)
4
tricky(adjective, low, corrupt, dishonest, immoral)
4
venal(adjective, corrupt, dishonest, immoral, deceitful)
11 years ago|14k views|share |citing 
APASmart Define. (2015). unethical thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unethical/thesaurus/synonyms
ChicagoSmart Define. 2015. "unethical thesaurus" https://smartdefine.org/unethical/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unethical thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unethical/thesaurus/synonyms>.
MLASmart Define. "unethical thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/unethical/thesaurus/synonyms>