Synonyms|319Antonyms|156|Broader|3Narrower|7Related|1.3k

114 entries under harmful topic. ×

4
disturbing(adjective, threatening, unfavorable, ominous)
4
foul(offensive, disgusting, unhealthy, poisonous)
4
malevolent(adjective, mean, bad, wrong, evil)
4
unfavorable(adjective, threatening, damaging, ominous)
3
cataclysmic(adjective, injurious, damaging, deadly)
3
pestiferous(adjective, bad, evil, injurious)
3
unhealthful(adjective, offensive, foul, disgusting, unhealthy)
2
pestilential(adjective, bad, evil, injurious)
2
corrupting(distressing, injurious, damaging, destructive)
2
crippling(adjective, injurious, damaging, destructive)
2
destroying(adjective, damaging)
2
dire(adjective, nasty, injurious, damaging)
2
distressing(cruel, unkind, upsetting, damaging)
2
mortal(adjective, bad, evil, injurious)
2
negative(adjective, injurious, unfavorable, disparaging)
2
nocent(adjective, negative, distressing, injurious)
2
rotten(evil, low, corrupt, injurious)
2
ruining(adjective, damaging)
2
slanderous(distressing, damaging)
2
spiteful(adjective, mean, evil, nasty, rude)
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ChicagoSmart Define. 2016. "deleterious thesaurus" https://smartdefine.org/deleterious/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, deleterious thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/deleterious/thesaurus/synonyms>.
MLASmart Define. "deleterious thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/deleterious/thesaurus/synonyms>