4
malicious(adjective, mean, bad, hard, evil)
4
mercenary(adjective, bad, wrong, dishonest, immoral)
4
nefarious(adjective, corrupt, wicked, dishonest, immoral)
4
petty(adjective, corrupt, unreasonable, dishonest, immoral)
4
recreant(adjective, mean, bad, base, false)
4
tricky(adjective, mean, smooth, smart, false)
4
wily(adjective, mean, smooth, smart, false)
4
wrongful(adjective, corrupt, dishonest, immoral, unwarranted)
3
deceiving(adjective, mean, bad, evil, false)
3
deceptive(adjective, mean, bad, smooth, smart)
3
dissolute(adjective, corrupt, wicked, dishonest, immoral)
3
doubtful
3
evasive
3
machiavellian
3
malevolent(adjective, mean, bad, evil, base)
3
mendacious(adjective, false, deceitful, lying, untruthful)
3
opportunistic
3
shameful(adjective, nasty, low, cruel, corrupt)
3
sinful(adjective, corrupt, wicked, depraved, perverted)
3
suspicious
10 years ago|19k views|share |citing 
APASmart Define. (2016). unscrupulous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unscrupulous/thesaurus/synonyms
ChicagoSmart Define. 2016. "unscrupulous thesaurus" https://smartdefine.org/unscrupulous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, unscrupulous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unscrupulous/thesaurus/synonyms>.
MLASmart Define. "unscrupulous thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/unscrupulous/thesaurus/synonyms>