Efficaciousness and Inefficiency

Opposite meaning words

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

Show all Definitions

Inefficiency is an antonym for efficaciousness in effect topic.

Inefficiency noun - Unskillfulness resulting from a lack of efficiency.

Show all Definitions

Efficaciousness is an antonym for inefficiency.

Nearby Words: inefficient, inefficiently

Cite this Source

Inefficiency and Efficaciousness. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/efficaciousness/inefficiency

Efficaciousness & Inefficiency. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/efficaciousness/inefficiency>.

Inefficiency or Efficaciousness. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/efficaciousness/inefficiency.

Google Ngram Viewer shows how "efficaciousness" and "inefficiency" have occurred on timeline