efficacy

As nouns the difference between efficacy and productivity

is that efficacy is (uncountable) ability to produce a desired amount of a desired effect while productivity is the state of being productive, fertile or efficient.

As nouns the difference between efficacy and get

is that efficacy is (uncountable) ability to produce a desired amount of a desired effect while get is offspring or get can be (british|regional) a git or get can be (judaism) a jewish writ of divorce.

As a verb get is

(label) to obtain; to acquire.

As nouns the difference between effectuality and efficacy

is that effectuality is the state or condition of being effectual while efficacy is (uncountable) ability to produce a desired amount of a desired effect.

As nouns the difference between efficacy and accomplishment

is that efficacy is (uncountable) ability to produce a desired amount of a desired effect while accomplishment is the act of accomplishing; entire performance; completion; fulfillment; as, the accomplishment of an enterprise, of a prophecy, etc.

As nouns the difference between autonomy and efficacy

is that autonomy is self-government; freedom to act or function independently while efficacy is (uncountable) ability to produce a desired amount of a desired effect.

As nouns the difference between safe and efficacy

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

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.

As a noun efficacy

is (uncountable) ability to produce a desired amount of a desired effect.

As an adjective undefined is

lacking a definition or value.

As an adjective proactive

is acting in advance to deal with an expected change or difficulty.

As a noun efficacy is

(uncountable) ability to produce a desired amount of a desired effect.

As nouns the difference between proactiveness and efficacy

is that proactiveness is the state or condition of being proactive while efficacy is (uncountable) ability to produce a desired amount of a desired effect.