Effectiveness Thesaurus / Antonyms

4	ineffectiveness(noun, weakness)
3	incompetence(noun, weakness, ineffectiveness)
2	feebleness(strength, robustness)
2	impotence(noun, weakness, ineffectiveness)
2	inability(noun, weakness, ineffectiveness)
2	inadequacy
2	ineffectuality
2	ineffectualness
2	weakness(noun, ineffectiveness)
1	inefficiency(noun, weakness, ineffectiveness)
1	disability(noun, weakness, ineffectiveness)
1	incapability
1	incapacity
1	incompetency
1	ineptitude
1	powerlessness
1	uselessness(noun, weakness, ineffectiveness)
0	abortion
0	awkwardness
0	blocking

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APA	Smart Define. (2016). effectiveness thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/effectiveness/thesaurus/antonyms
Chicago	Smart Define. 2016. "effectiveness thesaurus" https://smartdefine.org/effectiveness/thesaurus/antonyms (accessed September 22, 2026).
Harvard	Smart Define 2016, effectiveness thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/effectiveness/thesaurus/antonyms>.
MLA	Smart Define. "effectiveness thesaurus" 25 February 2016. Web. 22 September 2026. <https://smartdefine.org/effectiveness/thesaurus/antonyms>

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