8
unhealthful(adjective, healthy, unwholesome)
6
self-destructive
6
unhealthy
6
unwholesome(adjective, proper, unhealthful)
5
harmful
5
unsanitary
4
deleterious
4
delicate(adjective, strong, hard, harsh, sickly)
3
ill
3
injurious
3
insalubrious
3
insanitary
3
not good
3
noxious
3
pernicious
3
sick
2
ailing
2
baneful
2
crippling
2
cytopathogenic
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APASmart Define. (2016). healthful thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/healthful/thesaurus/antonyms
ChicagoSmart Define. 2016. "healthful thesaurus" https://smartdefine.org/healthful/thesaurus/antonyms (accessed October 1, 2026).
HarvardSmart Define 2016, healthful thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/healthful/thesaurus/antonyms>.
MLASmart Define. "healthful thesaurus" 29 March 2016. Web. 1 October 2026. <https://smartdefine.org/healthful/thesaurus/antonyms>