10
irrationality(noun, absurdity, inconsistency, unsoundness, implausibility)
7
infirmity(noun, difficulty, weakness, fault, lack)
6
disability(noun, disadvantage, restriction, impotence, infirmity)
6
preposterousness(noun, absurdity, implausibility)
5
weakness(noun, difficulty, fault, failing, flaw)
4
absurdity(noun, absurdity, implausibility)
4
debility(noun, difficulty, weakness, fault, lack)
4
frailty(noun, difficulty, weakness, fault, lack)
4
inability(noun, disadvantage, restriction, impotence, infirmity)
4
incapacity(noun, disadvantage, restriction, impotence, infirmity)
4
incongruity(noun, absurdity, inconsistency, irrationality)
4
inconsistency(noun, deception, mistake, error, falsehood)
4
invalidness
3
disablement(noun, impotence)
3
disqualification(noun, disadvantage, restriction, impotence, infirmity)
3
fallacy(noun, deception, mistake, error, deviation)
3
impotence(noun, weakness, fault, lack, lapse)
3
inanity(noun, absurdity)
3
nonsense(noun, absurdity, implausibility)
2
extravagance
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APASmart Define. (2015). Invalidity thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/invalidity/thesaurus/synonyms
ChicagoSmart Define. 2015. "Invalidity thesaurus" https://smartdefine.org/invalidity/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, Invalidity thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/invalidity/thesaurus/synonyms>.
MLASmart Define. "Invalidity thesaurus" 23 December 2015. Web. 20 September 2026. <https://smartdefine.org/invalidity/thesaurus/synonyms>