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 21, 2026, from https://smartdefine.org/sick/thesaurus/synonyms
ChicagoSmart Define. 2016. "sick thesaurus" https://smartdefine.org/sick/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, sick thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sick/thesaurus/synonyms>.
MLASmart Define. "sick thesaurus" 3 April 2016. Web. 21 September 2026. <https://smartdefine.org/sick/thesaurus/synonyms>