300 entries under weak topic. ×

62
invalid(adjective, feature, state, mean)
61
disabled(adjective, feature, state, hurt)
37
feeble(adjective, dull, mean, bad, strong)
34
weak(adjective, dull, change, mean, bad)
30
frail(adjective, mean, bad, strong, light)
27
sickly(adjective, dull, easy, disease)
23
decrepit(adjective, strong, light, slight)
20
unhealthy(adjective, mean, bad, disease)
19
ailing(adjective, mean, bad, thin)
19
ill(adjective, mean, sick, green)
19
unsound(adjective, strong, light, slight)
18
debilitated(adjective, mean, bad, thin)
18
fragile(adjective, strong, light, slight)
18
shaky(adjective, change, strong, slight)
16
delicate(adjective, mean, bad, strong)
16
rickety(adjective, mean, bad, slight)
16
sick(adjective, mean, bad, thin)
14
flimsy(adjective, strong, light, slight)
14
puny(adjective, strong, light, slight)
12
faint(adjective, dull, easy, weakness)
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APASmart Define. (2015). infirm thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/infirm/thesaurus/synonyms
ChicagoSmart Define. 2015. "infirm thesaurus" https://smartdefine.org/infirm/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, infirm thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/infirm/thesaurus/synonyms>.
MLASmart Define. "infirm thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/infirm/thesaurus/synonyms>