61
threatening(adjective, person, mean, bad, wrong)
43
sinister(adjective, person, appearance, mean, bad)
31
menacing(adjective, person, unpleasant, awful, feelings)
27
inauspicious(adjective, miserable, significant, foreboding, unfortunate)
27
grim(adjective, person, appearance, sad, awful)
24
foreboding(adjective, person, appearance, mean, bad)
21
gloomy(adjective, hard, severe, obscure, dark)
20
portentous(adjective, exciting, foreboding, warn, luck)
19
forbidding(adjective, person, appearance, dark, unpleasant)
19
minatory(adjective, foreboding, menacing, threat)
17
scary
16
fateful(adjective, significant, grave, foreboding, threatening)
15
unpropitious(adjective, mean, bad, wrong, evil)
14
baleful(adjective, warning, foreboding, threatening, doomed)
14
dangerous(adjective, unpleasant, heavy, cruel, horrible)
12
ugly(adjective, person, unpleasant, awful, heavy)
11
unfriendly(adjective, person, dark, negative, hostile)
11
perilous(adjective, heavy, gloomy, acute, major)
10
dark(adjective, upset, obscure, sad, unpleasant)
10
dire(adjective, miserable, wretched, foreboding, warn)
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APASmart Define. (2016). ominous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/ominous/thesaurus/synonyms
ChicagoSmart Define. 2016. "ominous thesaurus" https://smartdefine.org/ominous/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, ominous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/ominous/thesaurus/synonyms>.
MLASmart Define. "ominous thesaurus" 3 April 2016. Web. 22 September 2026. <https://smartdefine.org/ominous/thesaurus/synonyms>