48
damaging(adjective, mean, bad, wrong, severe)
43
injurious(adjective, person, help, mean, bad)
42
detrimental(adjective, help, mean, bad, wrong)
36
destructive(adjective, bad, severe, evil, awful)
34
pernicious(adjective, bad, cruel, negative, wicked)
33
deleterious(adjective, help, mean, bad, wrong)
31
hurtful(adjective, help, mean, bad, wrong)
29
noxious(adjective, mean, bad, wrong, evil)
26
disadvantageous(adjective, person, cruel, negative, unfriendly)
26
toxic(adjective, dangerous, injurious, damaging, deadly)
25
bad(adjective, person, help, mean, wrong)
22
baleful(adjective, negative, injurious, damaging, deadly)
21
evil(adjective, help, mean, bad, wrong)
21
ruinous(adjective, mean, bad, wrong, evil)
19
dangerous(adjective, bad, severe, offensive, awful)
19
adverse(adjective, person, unfriendly, injurious, hurtful)
18
malignant(adjective, bad, dangerous, injurious, hurtful)
16
baneful(adjective, bad, evil, negative, wicked)
16
disastrous(adjective, wicked, immoral, dreadful, malicious)
16
unhealthy(adjective, offensive, foul, disgusting, injurious)
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APASmart Define. (2016). harmful thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/harmful/thesaurus/synonyms
ChicagoSmart Define. 2016. "harmful thesaurus" https://smartdefine.org/harmful/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, harmful thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/harmful/thesaurus/synonyms>.
MLASmart Define. "harmful thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/harmful/thesaurus/synonyms>