Concentration
Concentration noun - A focusing of the mind on something.
Efficacy and concentration are semantically related. In some cases you can use "Efficacy" instead a noun "Concentration".
Efficacy
Efficacy noun - The power to produce a desired result.
Concentration and efficacy are semantically related. Sometimes you can use "Concentration" instead a noun "Efficacy".
Mutual synonyms
How words are described
Cite this Source
Efficacy and Concentration. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/concentration/efficacy
Concentration & Efficacy. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/concentration/efficacy>.
Efficacy or Concentration. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/concentration/efficacy.
Google Ngram Viewer shows how "concentration" and "efficacy" have occurred on timeline