7
unfavourable
7
cold(adjective, person, unwarmhearted)
7
cruel(adjective, person, awful, terrible, immoral)
7
dour(adjective, person, dark, unpleasant, feelings)
6
alarming(adjective, hard, severe, upsetting, danger)
6
antagonistic(adjective, person, negative, unfavorable, disapproving)
6
creepy(adjective, hard, severe, nasty, offensive)
6
dismal(adjective, obscure, sad, dark, awful)
6
evil(adjective, mean, bad, wrong, nasty)
6
fearful(adjective, foreboding, dangerous, menacing)
6
hard(adjective, person, severe, offensive, distressing)
6
harmful(adjective, cruel, unkind, upsetting, threatening)
6
hostile(adjective, dark, negative, unfriendly, grim)
6
ill-boding(adjective, foreboding, threatening, menacing, unfavorable)
6
ill-starred(adjective, miserable, wretched, black, unfortunate)
6
mean(adjective, person, harsh, unpleasant, cruel)
6
premonitory(adjective, warning, foreboding, threatening, prediction)
6
significant(adjective, characteristic, obscure, heavy, wise)
6
spiteful(adjective, person, unpleasant, cruel, horrible)
6
unfavorable(adjective, bad, miserable, wretched, unfortunate)
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APASmart Define. (2016). ominous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/ominous/thesaurus/synonyms
ChicagoSmart Define. 2016. "ominous thesaurus" https://smartdefine.org/ominous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, ominous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/ominous/thesaurus/synonyms>.
MLASmart Define. "ominous thesaurus" 3 April 2016. Web. 25 September 2026. <https://smartdefine.org/ominous/thesaurus/synonyms>