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Efficiencies vs Efficacy - What's the difference?

efficiencies | efficacy |

As nouns the difference between efficiencies and efficacy

is that efficiencies is while efficacy is (uncountable) ability to produce a desired amount of a desired effect.

efficiencies

English

Noun

(head)
  • efficacy

    English

    Noun

    (-)
  • (uncountable) Ability to produce a desired amount of a desired effect.
  • Synonyms

    * efficacity