159 entries under feeble topic. ×

24
weak(adjective, strong, light, slight, poor)
23
unstable(adjective, characteristic, quality, finance, banking)
21
infirm(adjective, strong, light, weak, slight)
20
defective(adjective, bad, wrong, thin, false)
18
frail(adjective, strong, light, weak, slight)
18
shaky(adjective, weak, slight, thin, delicate)
16
fragile(adjective, strong, light, weak, slight)
16
ill(adjective, weak, delicate, sick)
13
insubstantial(adjective, strong, light, weak, slight)
13
unsteady(adjective, weak, uncertain, unstable, ill)
13
unsubstantial(adjective, bad, strong, light, weak)
12
ailing(adjective, weak, delicate, dark, gloomy)
12
delicate(adjective, strong, weak, slight, thin)
12
flimsy(adjective, strong, light, weak, slight)
12
sick(adjective, weak, poor, false, inferior)
11
decrepit(adjective, strong, light, weak, slight)
11
sickly(adjective, weak, disease, delicate, dark)
10
insecure(adjective, weak, delicate, uncertain, sensitive)
10
worthless(adjective, characteristic, quality, finance, banking)
9
rickety(adjective, weak, slight, thin, delicate)
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APASmart Define. (2015). unsound thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unsound/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsound thesaurus" https://smartdefine.org/unsound/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unsound thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unsound/thesaurus/synonyms>.
MLASmart Define. "unsound thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unsound/thesaurus/synonyms>