What's the difference between
and
Enter two words to compare and contrast their definitions, origins, and synonyms to better understand how those words are related.

Efficacy vs Viability - What's the difference?

efficacy | viability |

As nouns the difference between efficacy and viability

is that efficacy is (uncountable) ability to produce a desired amount of a desired effect while viability is the property of being viable; the ability to live or to succeed.

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

    * *

    viability

    English

    (wikipedia viability)

    Noun

    (-)
  • the property of being viable; the ability to live or to succeed
  • * 1904, Hugo DeVries, Species and Varieties, Their Origin by Mutation
    • Ordinarily these altered organs are sterile, but in some instances a very small quantity of seed is produced, and when testing their viability I succeeded in raising a few plants from them.
  • * 1980, Jimmy Carter, State of the Union Address
    • In making its grants the Endowment will increase its emphasis on techniques which stimulate support for the humanities from non-Federal sources, in order to reinforce our tradition of private philanthropy in this field, and to insure and expand the financial, viability of our cultural institutions and life.

    Usage notes

    * Viability is a false friend in Italian, and it does not mean "".