5
lousy(adjective, mean, weak, sick, green)
5
low(adjective, hurt, weak, sad, thin)
5
nocuous(adjective, bad, evil, harmful, unfavorable)
5
not well(expression, adjective, idiom)
5
noxious(adjective, mean, bad, evil, harsh)
5
peaked(adjective, mean, weak, thin, sick)
5
peaky(adjective, weak, thin, sick, pale)
5
pernicious(adjective, rude, vicious, wicked, hostile)
5
rough
5
ruinous(adjective, bad, evil, arouse bad feelings)
5
run-down(adjective, weak, thin, sick, pale)
5
unpromising(adjective, bad, evil, negative, disapproving)
5
untoward(negative, disapproving, uncomplimentary)
5
vice(noun, wrong, damage, evil, harm)
5
vicious
5
vile(adjective, bad, evil)
4
abuse(noun, trouble, cut, hurt, wrong)
4
antagonistic(adjective, bad, evil, negative, contrary)
4
bane(noun, help, cause, bane)
4
crazy(adjective, sick, unwell, diseased, infected)
10 years ago|30k views|share |citing 
APASmart Define. (2016). ill thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ill/thesaurus/synonyms
ChicagoSmart Define. 2016. "ill thesaurus" https://smartdefine.org/ill/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, ill thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ill/thesaurus/synonyms>.
MLASmart Define. "ill thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/ill/thesaurus/synonyms>