Thesaurus

efficacy

noun

Synonyms and Antonyms of efficacy

  1. 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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feeling or affected by lethargy

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