Synonyms|11Antonyms|3|Broader|2Narrower|4Related|9
2
ineffectiveness
2
ineffectualness
1
ineffectuality
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APASmart Define. (2013). effectivity thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/effectivity/thesaurus/antonyms
ChicagoSmart Define. 2013. "effectivity thesaurus" https://smartdefine.org/effectivity/thesaurus/antonyms (accessed September 20, 2026).
HarvardSmart Define 2013, effectivity thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/effectivity/thesaurus/antonyms>.
MLASmart Define. "effectivity thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/effectivity/thesaurus/antonyms>