70
illogical(adjective, feature, state, correct, condition)
70
faulty(adjective, feature, state, bad, wrong)
68
infirm(adjective, feature, state, mean, weak)
66
void(adjective, feature, state, condition, situation)
65
disabled(adjective, feature, state, condition, situation)
64
incorrect(adjective, feature, state, wrong, fake)
20
unsound(adjective, bad, weak, correct, wrong)
19
fallacious(adjective, correct, wrong, fake, false)
18
sick(adjective, mean, weak, healthy, feeble)
18
wrong(adjective, bad, fake, false, counterfeit)
17
false(adjective, correct, wrong, fake, counterfeit)
15
erroneous(adjective, wrong, fake, false, counterfeit)
15
patient(noun, person, disease, case, subject)
14
bad(adjective, bad, false, ill, inadequate)
14
expired(adjective, feature, state, condition, situation)
11
spurious(adjective, correct, wrong, fake, false)
10
mad(adjective, foolish, crazy, unreasonable, ill)
10
null(adjective, void, unsound, worthless, unacceptable)
10
sickly(adjective, weak, ill, sick, feeble)
9
cripple(noun, disease, sickly person)
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APASmart Define. (2016). invalid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/invalid/thesaurus/synonyms
ChicagoSmart Define. 2016. "invalid thesaurus" https://smartdefine.org/invalid/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, invalid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/invalid/thesaurus/synonyms>.
MLASmart Define. "invalid thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/invalid/thesaurus/synonyms>