11
monstrous(adjective, bad, evil, low, corrupt)
11
treacherous(adjective, bad, corrupt, dishonest, immoral)
10
criminal(adjective, bad, wrong, evil, corrupt)
10
odious(adjective, good, bad, dislike, disgusting)
10
shameful(adjective, bad, wrong, evil, nasty)
10
wretched(adjective, good, evil, cruel, wicked)
9
low(adjective, good, mean, evil, corrupt)
8
degenerate(adjective, bad, wrong, evil, corrupt)
8
disgraceful(adjective, evil, offensive, unpleasant, base)
8
dishonorable(adjective, dislike, offensive, unpleasant, corrupt)
8
gross(adjective, bad, wrong, evil, offensive)
8
rotten(adjective, good, bad, wrong, evil)
8
scandalous(adjective, bad, wrong, evil, nasty)
8
sinister(adjective, evil, vice)
7
abhorrent(adjective, good, dislike, offensive, unpleasant)
7
contemptible(adjective, good, wrong, evil, shocking)
7
flagrant(adjective, bad, evil, awful, extreme)
7
horrible(adjective, bad, evil, offensive, base)
7
loathsome(adjective, good, bad, evil, offensive)
7
nasty(adjective, good, bad, wrong, evil)
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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>