89 entries under nasty topic. ×

14
malign(adjective, evil, dark, negative)
14
malignant(adjective, bad, evil, negative)
14
baneful(adjective, evil, negative, malevolent)
13
creepy(adjective, bad, awful, disgusting)
12
dishonest(adjective, evil, false, corrupt)
12
corrupt(adjective, evil, false, wicked)
12
gloomy(adjective, hard, obscure, rough)
12
injurious(adjective, bad, evil, harmful)
12
portentous(adjective, black, menacing, baleful)
12
unpropitious(adjective, mean, bad, wrong, evil)
11
forbidding(adjective, person, appearance, rough)
10
adverse(adjective, evil, harmful, injurious)
10
hateful(adjective, person, mean, bad, wrong)
9
dour(adjective, person, rough, dark)
9
harmful(adjective, bad, evil, injurious)
9
ill-boding(adjective, black, threatening, menacing)
9
lowering(adjective, sorrow, depress, sadness)
9
unfavorable(adjective, evil, threatening, menacing)
8
poisonous(adjective, bad, evil, harmful)
8
deleterious(adjective, bad, evil, harmful)
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APASmart Define. (2016). sinister thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sinister/thesaurus/synonyms
ChicagoSmart Define. 2016. "sinister thesaurus" https://smartdefine.org/sinister/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, sinister thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sinister/thesaurus/synonyms>.
MLASmart Define. "sinister thesaurus" 3 April 2016. Web. 27 September 2026. <https://smartdefine.org/sinister/thesaurus/synonyms>