Efficaciousness and Ineffectuality
Opposite meaning words
Efficaciousness
Efficaciousness noun - The power to produce a desired result.
Usage example: the debatable efficaciousness of many of the campaigns aimed at reducing smoking among teenagers
Ineffectuality is an antonym for efficaciousness.
Ineffectuality
Ineffectuality noun - Lacking the power to be effective.
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Synonyms for Ineffectuality
Efficaciousness is an antonym for ineffectuality.
Cite this Source
Ineffectuality and Efficaciousness. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/efficaciousness/ineffectuality
Efficaciousness & Ineffectuality. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/efficaciousness/ineffectuality>.
Ineffectuality or Efficaciousness. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/efficaciousness/ineffectuality.
Google Ngram Viewer shows how "efficaciousness" and "ineffectuality" have occurred on timeline