2
accursed(adjective, terrible, wicked, atrocious, vice)
2
arrant
2
barbarous(adjective, evil, terrible, cruel, wicked)
2
beastly(evil, awful, terrible, corrupt, vicious)
2
culpable(wrong, wicked, criminal, illegal, unlawful)
2
cunning
2
dangerous(adjective, bad, wicked, harmful, injurious)
2
degrading(adjective, harmful, injurious, detrimental)
2
detrimental(adjective, bad, evil, harmful, injurious)
2
diabolical(adjective, evil, violent, wild, fierce)
2
dirty(adjective, wrong, evil, offensive, unpleasant)
2
dishonest(adjective, wrong, corrupt, wicked, immoral)
2
dissolute(adjective, wrong, evil, low, corrupt)
2
fetid(adjective, offensive, unpleasant, disgusting, vicious)
2
foxy
2
harmful(bad, corrupt, immoral, sinful, injurious)
2
hateful(adjective, bad, offensive, unpleasant, violent)
2
hazardous(adjective, wicked, harmful, injurious, detrimental)
2
impious(adjective, wicked)
2
indecent(adjective, bad, wrong, evil, offensive)
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APASmart Define. (2015). nefarious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/nefarious/thesaurus/synonyms
ChicagoSmart Define. 2015. "nefarious thesaurus" https://smartdefine.org/nefarious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, nefarious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/nefarious/thesaurus/synonyms>.
MLASmart Define. "nefarious thesaurus" 8 October 2015. Web. 22 September 2026. <https://smartdefine.org/nefarious/thesaurus/synonyms>