Efficaciousness and Incompetency
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
Incompetency is an antonym for efficaciousness.
Incompetency
Incompetency noun - The lack of sufficient ability, power, or means.
Usage example: the incompetency of the secretary was revealed only after she had left the company, and her successor discovered years of filing left undone
Efficaciousness is an antonym for incompetency.
Cite this Source
Incompetency and Efficaciousness. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/efficaciousness/incompetency
Efficaciousness & Incompetency. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/efficaciousness/incompetency>.
Incompetency or Efficaciousness. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/efficaciousness/incompetency.
Google Ngram Viewer shows how "efficaciousness" and "incompetency" have occurred on timeline