96 entries under feeble topic. ×

1
debilitated(adjective, weak, thin, delicate, uncertain)
1
defective(weak, slight, poor, thin)
1
doddering(adjective, weak, thin, delicate)
1
effete(adjective, weak, thin, delicate, uncertain)
1
enervated(adjective, weak, thin, delicate, uncertain)
1
exhausted(adjective, weak, thin, delicate, uncertain)
1
haggard(adjective, dull, light, soft, poor)
1
house of cards(expression, weak, slight, thin)
1
incapacitated(frail, flimsy, dilapidated, debilitated)
1
languid(adjective, weak, thin, delicate, uncertain)
1
out of gas(expression, adjective, idiom, weak, thin)
1
powerless(adjective, weak, thin, delicate, uncertain)
1
quavering(frail, flimsy, dilapidated, debilitated)
1
rinkydink(weak, slight, thin, tacky)
1
rocky(adjective, uncertain, unstable, hesitant)
1
seedy(frail, flimsy, dilapidated, debilitated)
1
senile(adjective, uncertain, frail, puny)
1
shaking(frail, flimsy, dilapidated, debilitated)
1
sickly(adjective, dull, light, weak, soft)
1
slapdash(weak, slight, thin, tacky)
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APASmart Define. (2016). insubstantial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/insubstantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "insubstantial thesaurus" https://smartdefine.org/insubstantial/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, insubstantial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/insubstantial/thesaurus/synonyms>.
MLASmart Define. "insubstantial thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/insubstantial/thesaurus/synonyms>