43 entries under foreboding topic. ×

61
threatening(adjective, person, mean, bad, wrong)
43
sinister(adjective, person, appearance, mean, bad)
27
inauspicious(adjective, miserable, significant, unfortunate)
27
grim(adjective, person, appearance, sad, awful)
21
gloomy(adjective, hard, severe, obscure, dark)
20
portentous(adjective, exciting, warn, luck)
19
forbidding(adjective, person, appearance, dark, unpleasant)
19
minatory(adjective, menacing, threat)
16
fateful(adjective, significant, grave, threatening)
15
unpropitious(adjective, mean, bad, wrong, evil)
14
baleful(adjective, warning, threatening, doomed)
14
dangerous(adjective, unpleasant, heavy, cruel, horrible)
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, warn)
10
unlucky(adjective, negative, wretched, grave)
9
unpromising(adjective, negative, threatening, menacing)
8
lowering(adjective, menacing)
8
apocalyptic(adjective, significant, grave, warn)
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APASmart Define. (2016). ominous thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/ominous/thesaurus/synonyms
ChicagoSmart Define. 2016. "ominous thesaurus" https://smartdefine.org/ominous/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, ominous thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/ominous/thesaurus/synonyms>.
MLASmart Define. "ominous thesaurus" 3 April 2016. Web. 21 September 2026. <https://smartdefine.org/ominous/thesaurus/synonyms>