3
unfaithful(adjective, mean, bad, base, dishonest)
3
unjust(adjective, dirty, dishonest, immoral, cunning)
3
unreliable(adjective, dubious, sly, devious, shifty)
3
unsportsmanlike
3
untruthful(adjective, false, corrupt, dishonest, deceitful)
3
unworthy(adjective, immoral)
3
vicious(adjective, hard, evil, rough, nasty)
2
abandoned(adjective, corrupt, wicked, dishonest, immoral)
2
abominable(adjective, wicked)
2
arrant(adjective, immoral)
2
atrocious(adjective, wicked)
2
awful(adjective, wicked)
2
below the belt(expression, adjective, idiom, adverb, dirty)
2
blackguardly(shameful, disgraceful, disreputable)
2
bribable(adjective, dishonest, immoral, rotten, untrustworthy)
2
casuistic(adjective, immoral)
2
cheap
2
conniving(adjective, mean, smooth, negative, cunning)
2
corruptible
2
cruel(adjective, evil, nasty, corrupt, wicked)
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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>