2
fear
2
foretelling
2
foretokening
2
foul
2
glowering(adjective, person, dark, terrible, feelings)
2
grisly(appearance, terrible, immoral, shocking, atrocious)
2
hapless(miserable, wretched, unfortunate, doomed, unsuccessful)
2
heavy(adjective, acute, threatening, dangerous, crucial)
2
hellfire(adjective, warn, luck, fateful)
2
helpless
2
horrid(appearance, awful, terrible, shocking, hopeless)
2
inimical(adjective, negative, disapproving, uncomplimentary, negative emotions)
2
insecure(adjective, dangerous)
2
looming
2
louring
2
luckless(miserable, wretched, unfortunate, doomed, unsuccessful)
2
malefic(adjective, foreboding, menacing)
2
malignant
2
mantic
2
mischievous(cruel, unkind, upsetting, threatening, menacing)
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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>