5
evil(adjective, cruel, negative, unkind, distressing)
4
destructive(adjective, cruel, negative, unkind, distressing)
4
inimical(adjective, harmful, injurious, damaging, unfavorable)
4
malicious(adjective, cruel, unkind, injurious, noxious)
4
negative(adjective, harmful, injurious, unfavorable, arouse bad feelings)
4
unfavorable(adjective, harmful, arouse bad feelings, negative emotions, undermining)
3
malefic(adjective, injurious, damaging, destructive, inexpedience)
3
noisome(adjective, inexpedience)
2
disastrous(adjective, injurious, damaging, destructive, arouse bad feelings)
2
disturbing(adjective, harmful, unfavorable, arouse bad feelings)
2
menacing(adjective, injurious, damaging, destructive, negative emotions)
2
ominous(adjective, cruel, unkind, upsetting, negative emotions)
2
ruinous(adjective, negative, distressing, harmful, injurious)
2
sinister(adjective, injurious, damaging, destructive, negative emotions)
2
undesireworthy(adjective, arouse bad feelings, negative emotions)
1
balefulness
1
disserviceable
1
fatal
1
full of mischief(expression, idiom, inexpedience)
1
hurtfulness
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APASmart Define. (2016). nocuous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/nocuous/thesaurus/synonyms
ChicagoSmart Define. 2016. "nocuous thesaurus" https://smartdefine.org/nocuous/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, nocuous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/nocuous/thesaurus/synonyms>.
MLASmart Define. "nocuous thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/nocuous/thesaurus/synonyms>