4
infected
4
pathogenic
4
pestiferous(offensive, foul, disgusting, harmful, poisonous)
4
unclean(adjective, dirty)
3
bad
3
baneful(offensive, foul, disgusting, unhealthy, harmful)
3
deleterious(adjective, offensive, foul, disgusting, unhealthy)
3
destructive(adjective, harmful, poisonous, toxic)
3
evil
3
hurtful(offensive, foul, disgusting, harmful, poisonous)
3
infirm
3
morbific
3
pernicious(adjective, offensive, foul, disgusting, unhealthy)
2
damaging(adjective, harmful, injurious, detrimental)
2
deadly(offensive, foul, disgusting, harmful, poisonous)
2
morbid(adjective, offensive, foul, unhealthy, harmful)
1
ailing
1
bad for
1
crippling
1
disabling
11 years ago|9.1k views|share |citing 
APASmart Define. (2015). unhealthful thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unhealthful/thesaurus/synonyms
ChicagoSmart Define. 2015. "unhealthful thesaurus" https://smartdefine.org/unhealthful/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unhealthful thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unhealthful/thesaurus/synonyms>.
MLASmart Define. "unhealthful thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/unhealthful/thesaurus/synonyms>