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Usefulness vs Efficacy - What's the difference?

usefulness | efficacy |

As nouns the difference between usefulness and efficacy

is that usefulness is the quality of being useful, to which extent something is useful while efficacy is (uncountable) ability to produce a desired amount of a desired effect.

usefulness

English

Noun

(-)
  • the quality of being useful, to which extent something is useful
    • The usefulness of his latest reorganisation has been disputed.

    See also

    * beauty

    efficacy

    English

    Noun

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

    • Synonyms

    * efficacity

    Related terms

    * effect * effective * effectiveness * effectivity * effector * effectual * effectuate * efficacious * efficacity * efficiency * efficient

    External links

    * *