2
miserable(wretched, unfortunate, doomed, unsuccessful)
2
momentous(adjective, heavy, significant, acute, dangerous)
2
monstrous(adjective, shocking, unnatural)
2
morbid(adjective, evil, sad, awful, immoral)
2
nasty(adjective, evil, unpleasant, awful, cruel)
2
negative(adjective, disapproving, uncomplimentary, negative emotions)
2
nocuous(adjective, cruel, unkind, upsetting, negative emotions)
2
noisome(adjective, unpleasant, horrible, disagreeable, dreadful)
2
noxious(cruel, unkind, upsetting)
2
odious(adjective, person, evil, dark, unpleasant)
2
out of luck(expression, idiom, miserable, wretched, unfortunate)
2
pessimistic(hard, severe, offensive, distressing, upsetting)
2
poisonous(cruel, unkind, upsetting, threatening, menacing)
2
portending(imminent, forthcoming, menacing, approaching, intimidating)
2
precarious(adjective, dangerous)
2
scowling(adjective, appearance, nasty, unpleasant, awful)
2
severe(adjective, appearance, hard, dark, heavy)
2
shocking(adjective, appearance, evil, offensive, unpleasant)
2
sibyllic
2
sullen(adjective, mean, bad, wrong, evil)
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APASmart Define. (2016). ominous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ominous/thesaurus/synonyms
ChicagoSmart Define. 2016. "ominous thesaurus" https://smartdefine.org/ominous/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, ominous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ominous/thesaurus/synonyms>.
MLASmart Define. "ominous thesaurus" 3 April 2016. Web. 26 September 2026. <https://smartdefine.org/ominous/thesaurus/synonyms>