12
untrue(adjective, bad, correct, wrong, fake)
12
unwell(adjective, ill, well, shaky, unhealthy)
11
decrepit(adjective, strong, light, weak, slight)
11
irrational(adjective, wrong, false, silly, foolish)
11
perilous(adjective, severe, delicate, awful, terrible)
11
sickly(adjective, weak, disease, delicate, dark)
10
hazardous(adjective, severe, delicate, awful, terrible)
10
insecure(adjective, weak, delicate, uncertain, sensitive)
10
precarious(adjective, weak, delicate, uncertain, sensitive)
10
treacherous(adjective, severe, delicate, false, awful)
10
unwholesome(adjective, offensive, foul, unhealthy, harmful)
10
worthless(adjective, characteristic, quality, finance, banking)
9
chancy(adjective, severe, delicate, awful, terrible)
9
crazed(adjective, crazy, mad, well, insane)
9
demented(adjective, foolish, crazy, unstable, well)
9
inadequate(adjective, bad, poor, small, insignificant)
9
rickety(adjective, weak, slight, thin, delicate)
9
rotten(adjective, bad, poor, false, uncertain)
9
unbalanced(adjective, simple, foolish, crazy, well)
9
wobbly(adjective, weak, slight, thin, delicate)
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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>