7
cataclysmal(adjective, help, destructive)
7
unpropitious(adjective, adverse, inauspicious)
6
adverse(adjective, dreadful, adverse, unfortunate, injurious)
6
suicidal(adjective, harmful, injurious, damaging, deadly)
6
unfavourable
5
awful(adjective, sad, unhappy, terrible, sorrowful)
5
baneful(adjective, grave, harmful, injurious, damaging)
5
dreadful(adjective, sad, unhappy, awful, terrible)
5
ill-fated(adjective, miserable, wretched, unfortunate, doomed)
5
inauspicious(adjective, unhappy, miserable, wretched, adverse)
5
mournful(adjective, sad, unhappy, sorrowful)
5
pernicious(adjective, dreadful, harmful, injurious, damaging)
5
woeful(adjective, sad, unhappy, awful, terrible)
4
distressing(adjective, sad, unhappy, awful, terrible)
4
evil(adjective, harmful, injurious, damaging, deadly)
4
negative
3
miserable(adjective, sad, unhappy, wretched, adverse)
3
appalling(adjective, sad, unhappy, awful, terrible)
3
bad(sad, unhappy, sorrowful, injurious, damaging)
3
baleful(adjective, harmful, injurious, damaging, deadly)
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APASmart Define. (2015). catastrophic thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/catastrophic/thesaurus/synonyms
ChicagoSmart Define. 2015. "catastrophic thesaurus" https://smartdefine.org/catastrophic/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, catastrophic thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/catastrophic/thesaurus/synonyms>.
MLASmart Define. "catastrophic thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/catastrophic/thesaurus/synonyms>