What is another word for 'efficacy'?

Synonyms for EFFICACY: efficaciousness, efficacity, ability, aptitude, capability, capacity, cleverness, cogency, competency, dexterity, efficiency, energy, expertness, faculty, force, might, power, qualification, readiness, skill, strength, susceptibility, talent, virtue, agency, usefulness, productiveness, effectiveness, potency, effective, efficient, efficiencies, edge, effectualness, etc.

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