8
traitorous(adjective, mean, bad, smooth, smart)
7
amoral(adjective, corrupt, wicked, dishonest, immoral)
7
disgraceful(adjective, corrupt, dishonest, immoral, crooked)
7
disingenuous(adjective, negative, bad behavior)
7
felonious(adjective, dishonest)
7
not good
7
questionable(adjective, immoral)
7
roguish(adjective, mean, smooth, dishonest, cunning)
7
sneaky(adjective, mean, bad, smooth, wrong)
7
two-faced(adjective, mean, bad, wrong, base)
6
hypocritical(adjective, mean, bad, evil, base)
6
improper(adjective, wrong, corrupt, unreasonable, dishonest)
6
ruthless(adjective, honest, wicked, immoral)
6
scheming(adjective, mean, smooth, corrupt, negative)
6
sinister(adjective, false, corrupt, dishonest, immoral)
5
bad(adjective, mean, wrong, evil, corrupt)
5
bent(adjective, false, corrupt, dishonest, immoral)
5
depraved(adjective, wrong, corrupt, wicked, immoral)
5
disreputable(adjective, bad, wrong, low, false)
5
dubious(adjective, corrupt, dishonest, crooked, criminal)
10 years ago|19k views|share |citing 
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>