Effectivity and Efficacy

Effectivity

Effectivity noun - Power to be effective; the quality of being able to bring about an effect.
Show all Definitions
Synonyms for Effectivity

Efficacy and effectivity are semantically related in effectiveness topic. In some cases you can use "Efficacy" instead a noun "Effectivity", when it comes to topics like efficiency.

Efficacy

Efficacy noun - Capacity or power to produce a desired effect.
Usage example: concern about the safety and efficacy of the vaccine

Effectivity and efficacy are semantically related in effectiveness topic. You can use "Effectivity" instead a noun "Efficacy", if it concerns topics such as efficiency.

Cite this Source
Efficacy and Effectivity. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/effectivity/efficacy
Effectivity & Efficacy. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/effectivity/efficacy>.
Efficacy or Effectivity. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/effectivity/efficacy.
Google Ngram Viewer shows how "effectivity" and "efficacy" have occurred on timeline