2
despicably
2
disastrously
2
dismally
2
dourly
2
fatally
2
hazardously(adverb, dangerously)
2
heavily
2
ill-omenedly
2
minatorily
2
ominous
2
portentously
2
treacherously(adverb, dangerously)
2
unpromisingly
2
unsafely(adverb, dangerously)
1
adversely
1
atrociously
1
blackly
1
calamitously
1
dimly
1
frightfully
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APASmart Define. (2015). ominously thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/ominously/thesaurus/synonyms
ChicagoSmart Define. 2015. "ominously thesaurus" https://smartdefine.org/ominously/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, ominously thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/ominously/thesaurus/synonyms>.
MLASmart Define. "ominously thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/ominously/thesaurus/synonyms>