8
harmful(adjective, harm, distress, suffering, impairment)
8
poison(noun, substance, drugs, medicamentation)
7
damaging(adjective, harm, distress, suffering, impairment)
5
baneful(adjective, harm, distress, suffering)
5
ill(adjective, health, harm, distress, organism)
5
injurious(adjective, harm, distress, suffering)
5
insanitary(adjective, description, characteristics, features)
5
toxic(adjective, health, illness, states)
5
venom(noun, substance, drugs, medicamentation)
4
hurtful(adjective, harm, distress, suffering)
4
malefic(adjective, health, illness, states)
4
malignant(adjective, harm, distress, suffering)
4
calamitous(adjective, harm, distress, suffering)
4
deleterious(adjective, harm, distress, suffering, impairment)
4
disastrous(adjective, harm, distress, suffering)
4
infectious(adjective, description, characteristics, features)
4
nocuous(adjective, harm, distress, suffering)
4
noxious(adjective, health, harm, distress, illness)
4
pestiferous(adjective, harm, impairment, badness)
4
poisonous(adjective, health, harm, distress, illness)
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APASmart Define. (2015). therapeutic thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/therapeutic/thesaurus/antonyms
ChicagoSmart Define. 2015. "therapeutic thesaurus" https://smartdefine.org/therapeutic/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, therapeutic thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/therapeutic/thesaurus/antonyms>.
MLASmart Define. "therapeutic thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/therapeutic/thesaurus/antonyms>