158 entries under weak topic. ×

23
invalid(adjective, bad, correct, wrong)
23
unstable(adjective, characteristic, quality, finance, banking)
21
infirm(adjective, strong, light, slight)
21
unhealthy(adjective, severe, disease, poor)
20
false(adjective, bad, light, correct)
18
frail(adjective, strong, light, slight)
18
shaky(adjective, slight, thin, delicate)
16
feeble(adjective, strong, light, slight)
16
fragile(adjective, strong, light, slight)
16
ill(adjective, delicate, sick, feeble)
13
insubstantial(adjective, strong, light, slight)
13
unsteady(adjective, uncertain, unstable, ill)
13
unsubstantial(adjective, bad, strong, light)
12
ailing(adjective, delicate, dark, gloomy)
12
delicate(adjective, strong, slight, thin)
12
flimsy(adjective, strong, light, slight)
12
sick(adjective, poor, false, inferior)
11
decrepit(adjective, strong, light, slight)
11
sickly(adjective, disease, delicate, dark)
10
insecure(adjective, delicate, uncertain, sensitive)
<12345…8>
11 years ago|31k views|share |citing 
APASmart Define. (2015). unsound thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/unsound/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsound thesaurus" https://smartdefine.org/unsound/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, unsound thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/unsound/thesaurus/synonyms>.
MLASmart Define. "unsound thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/unsound/thesaurus/synonyms>