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THESAURUS

Efficacious Synonyms & Antonyms

(formal) Effective; possessing efficacy.

Synonyms

effectiveimpressivetrenchanteffectualtellinghard-hittingimpelling

Antonyms

inefficaciousineffectualineffectiveuneffective

Related Words

effectualeffectiveimpressivetellinghard-hittingtrenchantimpellingefficacyeffectivelyeffectivenessefficientlyefficiencyefficientsuccessfulpotentpowerfulproductiveusefulbeneficialoperative

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