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 20, 2026, from https://smartdefine.org/ominous/thesaurus/synonyms
ChicagoSmart Define. 2016. "ominous thesaurus" https://smartdefine.org/ominous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, ominous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/ominous/thesaurus/synonyms>.
MLASmart Define. "ominous thesaurus" 3 April 2016. Web. 20 September 2026. <https://smartdefine.org/ominous/thesaurus/synonyms>