As nouns the difference between efficacy and universality
is that efficacy is ability to produce a desired amount of a desired effect while universality is the property of being universal, common to all members of a class.
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
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universality
English
Noun
the property of being universal, common to all members of a class