| killing(adjective, death, deadly, lethal) | |
| pestilent(adjective, dangerous, deadly, lethal) | |
| self-destructive | |
| dreadful | |
| grave(adjective, dangerous, crucial) | |
| incurable(adjective, pessimistic, deadly, final, desperate) | |
| injurious(adjective, bad, evil, wicked, harmful) | |
| murderous | |
| predestined(adjective, important, critical, doomed) | |
| tragic(adjective, bad, catastrophic) | |
| damned | |
| deleterious(adjective, bad, evil, harmful, injurious) | |
| destined(adjective, important, critical) | |
| final(adjective, important, critical, deadly, lethal) | |
| internecine(adjective, violent, cruel, harmful, killing) | |
| pestilential(adjective, bad, evil, harmful, injurious) | |
| severe(adjective, dangerous) | |
| unlucky(adjective, important, critical) | |
| venomous(adjective, bad, evil, harmful, dangerous) | |
| cataclysmal(adjective, help, destructive) |
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| APA | Smart Define. (2016). fatal thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fatal/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fatal thesaurus" https://smartdefine.org/fatal/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, fatal thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fatal/thesaurus/synonyms>. |
| MLA | Smart Define. "fatal thesaurus" 3 April 2016. Web. 23 September 2026. <https://smartdefine.org/fatal/thesaurus/synonyms> |