Synonyms and Antonyms of efficacy
the power to produce a desired result <questioned the efficacy of the alarms in actually preventing auto theft> Synonyms edge, effectiveness, effectualness, efficaciousness, efficacity, efficiency, productiveness Related Words ability, capability, capacity; potency, puissance, strength Near Antonyms inability, inadequacy, inadequateness, incompetence, incompetency Antonyms ineffectiveness, ineffectuality, ineffectualness, inefficiency
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