181 entries under adjective topic. ×

7
killing(death, deadly, lethal)
7
pestilent(dangerous, deadly, lethal)
6
dreadful
6
grave(dangerous, crucial)
6
incurable(pessimistic, deadly, final, desperate)
6
injurious(bad, evil, wicked, harmful)
6
murderous
6
predestined(important, critical, doomed)
6
tragic(bad, catastrophic)
5
deleterious(bad, evil, harmful, injurious)
5
destined(important, critical)
5
final(important, critical, deadly, lethal)
5
internecine(violent, cruel, harmful, killing)
5
pestilential(bad, evil, harmful, injurious)
5
severe
5
unlucky(important, critical)
5
venomous(bad, evil, harmful, dangerous)
4
cataclysmal(help, destructive)
4
decisive(important, critical)
4
detrimental(bad, evil, harmful, dangerous)
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APASmart Define. (2016). fatal thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/fatal/thesaurus/synonyms
ChicagoSmart Define. 2016. "fatal thesaurus" https://smartdefine.org/fatal/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, fatal thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/fatal/thesaurus/synonyms>.
MLASmart Define. "fatal thesaurus" 3 April 2016. Web. 24 September 2026. <https://smartdefine.org/fatal/thesaurus/synonyms>