48
ill(noun, adjective, health, mean, bad)
35
unwell(adjective, adverb, health, mean, bad)
32
ailing(adjective, adverb, health, mean, bad)
25
unhealthy(adjective, adverb, good, mean, feeling)
22
sickly(adjective, adverb, health, dull, light)
22
poorly(adjective, adverb, mean, disease, healthy)
21
queasy(adjective, mean, bad, weak, delicate)
18
feeble(adjective, dull, mean, feeling, bad)
18
indisposed(adjective, mean, bad, weak, disease)
17
diseased(adjective, adverb, health, mean, bad)
17
invalid(adjective, mean, feeling, weak, healthy)
17
nauseated(adjective, mean, bad, weak, delicate)
17
under the weather(expression, adjective, idiom, adverb, weak)
16
infirm(adjective, mean, feeling, bad, weak)
16
unsound(adjective, state, weak, poor, false)
15
dysfunctional(adjective, impaired)
15
macabre(adjective, good, bad, awful, disgusting)
14
gruesome(adjective, bad, informal, awful, disgusting)
14
nauseous(adjective, unhappy, disgusting, ill, weary)
13
afflicted(adjective, health, sad, unhappy, gloomy)
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APASmart Define. (2016). sick thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sick/thesaurus/synonyms
ChicagoSmart Define. 2016. "sick thesaurus" https://smartdefine.org/sick/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, sick thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sick/thesaurus/synonyms>.
MLASmart Define. "sick thesaurus" 3 April 2016. Web. 20 September 2026. <https://smartdefine.org/sick/thesaurus/synonyms>