40 entries under devastating topic. ×

31
fatal(adjective, bad, evil, painful, suffering)
28
lethal(adjective, bad, evil, live, harmful)
26
mortal(adjective, dull, awful, terrible, horrible)
21
pernicious(adjective, help, bad, evil, cruel)
21
toxic(adjective, bad, evil, unhealthy, harmful)
19
noxious(adjective, help, bad, evil, cruel)
18
baneful(adjective, help, bad, evil, distressing)
17
destructive(adjective, bad, evil, destruction, dangerous)
15
suicidal(adjective, destruction, harmful, killing, injurious)
14
venomous(adjective, bad, evil, hateful, harmful)
13
harmful(adjective, bad, evil, cruel, unkind)
11
deleterious(adjective, bad, evil, cruel, unkind)
10
baleful(adjective, bad, evil, harmful, injurious)
10
noisome(adjective, bad, evil, offensive, immoral)
9
injurious(adjective, cruel, unkind, distressing, adverse)
9
detrimental(adjective, bad, evil, cruel, unkind)
9
disastrous(adjective, sad, painful, suffering, dreadful)
9
ruinous(adjective, bad, destruction, painful, suffering)
8
catastrophic(adjective, sad, awful, painful, suffering)
7
pestilential(adjective, help, bad, evil, harmful)
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APASmart Define. (2016). deadly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/deadly/thesaurus/synonyms
ChicagoSmart Define. 2016. "deadly thesaurus" https://smartdefine.org/deadly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, deadly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/deadly/thesaurus/synonyms>.
MLASmart Define. "deadly thesaurus" 26 March 2016. Web. 22 September 2026. <https://smartdefine.org/deadly/thesaurus/synonyms>