50 entries under nefarious topic. ×

24
dark(adjective, upset, dull, evil, obscure)
14
forbidding(adjective, person, tough, evil, dark)
7
dour(adjective, person, tough, evil, offensive)
7
glowering(adjective, person, tough, evil, offensive)
7
nasty(adjective, bad, evil, delicate, unpleasant)
5
bad(adjective, mean, wrong, evil, nasty)
5
sullen(adjective, mean, bad, wrong, evil)
4
atrocious(adjective, evil, obscure, dark, gloomy)
4
frowning(adjective, evil, critical, mysterious, forbidding)
4
glum(adjective, evil, unpleasant, horrible, disagreeable)
4
horrible(adjective, strong, severe, evil, obscure)
4
scowling(adjective, close, evil, nasty, unpleasant)
2
corrupt(adjective, evil, nasty, mysterious, disturbing)
2
evil(adjective, mean, bad, wrong, nasty)
2
foul(adjective, mean, bad, wrong, evil)
2
infernal(adjective, evil, mysterious, spooky)
2
mysterious(adjective, evil, spooky)
2
sinful(adjective, evil, mysterious, spooky)
2
sulky(adjective, evil, mysterious, spooky)
2
vile(adjective, mean, bad, wrong, evil)
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APASmart Define. (2016). threatening thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/threatening/thesaurus/synonyms
ChicagoSmart Define. 2016. "threatening thesaurus" https://smartdefine.org/threatening/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, threatening thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/threatening/thesaurus/synonyms>.
MLASmart Define. "threatening thesaurus" 23 March 2016. Web. 20 September 2026. <https://smartdefine.org/threatening/thesaurus/synonyms>