97 entries under damaging topic. ×

8
virulent(adjective, mean, bad, evil, nasty)
7
calamitous(adjective, harmful, injurious, deadly)
7
catastrophic(adjective, harmful, injurious, deadly)
7
lethal(adjective, bad, evil, harmful, injurious)
7
malicious(adjective, mean, bad, wrong, evil)
7
nocuous(adjective, cruel, negative, unkind, harmful)
6
venomous(adjective, mean, bad, evil, nasty)
5
fatal(adjective, bad, evil, harmful, injurious)
5
malefic(adjective, negative, harmful, threatening, injurious)
4
devastating(adjective, bad, evil, wicked, harmful)
4
unfavorable(adjective, harmful, threatening, ominous)
3
cataclysmic(adjective, harmful, injurious, deadly)
3
pestiferous(adjective, bad, evil, harmful, injurious)
2
pestilential(adjective, bad, evil, harmful, injurious)
2
corroding(injurious, destructive)
2
corrupting(distressing, harmful, injurious, destructive)
2
crippling(adjective, harmful, injurious, destructive)
2
destroying(adjective, harmful)
2
dire(adjective, nasty, harmful, injurious)
2
distressing(cruel, unkind, upsetting, harmful)
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APASmart Define. (2016). deleterious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/deleterious/thesaurus/synonyms
ChicagoSmart Define. 2016. "deleterious thesaurus" https://smartdefine.org/deleterious/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, deleterious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/deleterious/thesaurus/synonyms>.
MLASmart Define. "deleterious thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/deleterious/thesaurus/synonyms>