65 entries under unfit topic. ×

70
faulty(adjective, feature, state, bad, wrong)
65
disabled(adjective, feature, state, condition, situation)
20
unsound(adjective, bad, weak, correct, wrong)
14
bad(adjective, bad, false, ill, inadequate)
10
sickly(adjective, weak, ill, sick, feeble)
8
ineffective(adjective, poor, inadequate, useless, void)
8
untenable(adjective, useless, reasoning)
8
weak(adjective, mean, bad, poor, delicate)
7
inadequate(adjective, bad, poor, false, useless)
6
improper(adjective, wrong, fake, counterfeit, dishonest)
4
incompetent(adjective, poor, inadequate, useless)
4
run-down(adjective, sick, unhealthy, infirm)
4
unusable(adjective, useless, inapplicable)
3
ill-suited(adjective, bad, useless)
3
impracticable(adjective, useless, inapplicable)
3
inadaptable(adjective, useless, inapplicable)
3
inapplicable(adjective, useless)
3
incapacitated(adjective, useless)
3
unwell(adjective, mean, weak, sick, green)
2
enervated(unhealthy, flabby, senescent, irresilient)
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APASmart Define. (2016). invalid thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/invalid/thesaurus/synonyms
ChicagoSmart Define. 2016. "invalid thesaurus" https://smartdefine.org/invalid/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, invalid thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/invalid/thesaurus/synonyms>.
MLASmart Define. "invalid thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/invalid/thesaurus/synonyms>