42
sickness(noun, health, trouble, hurt, weak)
40
disease(noun, health, upset, trouble, disorder)
34
malady(noun, health, upset, trouble, hurt)
27
ailment(noun, health, upset, trouble, weak)
24
infirmity(noun, health, trouble, disorder, evil)
23
virus(noun, health, disorder, disease, cold)
20
disorder(noun, health, trouble, weak, defeat)
18
indisposition(noun, health, trouble, disorder, evil)
18
taint(noun, disease, infection, virus, contagion)
17
complaint(noun, health, upset, trouble, weak)
17
infection(noun, health, disorder, disease, condition)
14
ill(noun, health, weak, disorder, disease)
12
contagion(noun, health, disorder, disease, feelings)
11
condition(noun, health, upset, trouble, disorder)
10
disability(noun, health, upset, disorder, disease)
10
distemper(noun, health, disorder, disease, feelings)
9
contamination(noun, hurt, disorder, damage, disease)
9
sickliness(noun, weak, disorder, disease, weakness)
8
affliction(noun, health, upset, trouble, hurt)
8
unwellness(noun, disorder, disease, weakness, sickness)
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APASmart Define. (2016). illness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/illness/thesaurus/synonyms
ChicagoSmart Define. 2016. "illness thesaurus" https://smartdefine.org/illness/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, illness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/illness/thesaurus/synonyms>.
MLASmart Define. "illness thesaurus" 29 February 2016. Web. 21 September 2026. <https://smartdefine.org/illness/thesaurus/synonyms>