2
crippling(adjective, harmful, injurious, damaging, destructive)
2
debased(evil, vicious)
2
destroying(adjective, harmful, damaging)
2
dire(adjective, nasty, harmful, injurious, damaging)
2
disserviceable
2
distressing(cruel, unkind, upsetting, harmful, damaging)
2
mephitic(adjective, insalubrity)
2
mortal(adjective, bad, evil, harmful, injurious)
2
negative(adjective, harmful, injurious, unfavorable, disparaging)
2
nocent(adjective, negative, distressing, harmful, injurious)
2
not helpful
2
ominous(cruel, unkind, upsetting, threatening, menacing)
2
rotten(evil, low, corrupt, harmful, injurious)
2
ruining(adjective, harmful, damaging)
2
slanderous(distressing, harmful, damaging)
2
spiteful(adjective, mean, evil, nasty, rude)
2
unhygienic(adjective, harmful, injurious, detrimental)
2
unprofitable(damaging, disparaging, hurtful, detrimental, derogatory)
2
wicked(adjective, mean, bad, wrong, evil)
1
alarming(adjective, arouse bad emotions)
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APASmart Define. (2016). deleterious thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/deleterious/thesaurus/synonyms
ChicagoSmart Define. 2016. "deleterious thesaurus" https://smartdefine.org/deleterious/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, deleterious thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/deleterious/thesaurus/synonyms>.
MLASmart Define. "deleterious thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/deleterious/thesaurus/synonyms>