Synonyms and Antonyms for Efficacious

Following is a list of 150 synonym words and phrases that are related to efficacious:

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4 Letter Words

safe

5 Letter Words

adept

6 Letter Words

potentusefulrobustviablesafest

7 Letter Words

tellingskilfuldurableworking

8 Letter Words

efficacycurativereliablefeasibleworkablesanativeamenablesalutaryadequatenontoxicvirtuouslaudableskillfulfruitfulsuitablepowerfulremedialavailingspeedful

9 Letter Words

effectualeffectivetrenchantimpellingefficienteminentlyexpedienthealthfulantidotalpromotiveaffectiveequitableimpactfuldesirablecompetentpracticalpromisingagreeableimpactivetolerableopportunefoolproofcongruoushonorableefficiousoperativeenergetic

10 Letter Words

impressiveefficiencysuccessfulbeneficialefficacityalterativebeneficentadjunctiveeradicableaffordableprofitableunamenablepreventiveconvenientacceptableefficaciesachievableliberativeinnovativeutilizablerealizableclinicallymeaningfulinhibitivesalubriousconsistentredemptiverewardablepropitioushonourablereplicableinefficacydissuasiveacceptablyvitalizingeffectuouseffectible

11 Letter Words

effectivelyefficientlyalleviativeineffectivealterativesmeritoriousexpeditiousimplementaltherapeuticsynergisticbeneficientpracticableintegrativeinexpensiverestorativeserviceablesupportablealternativesustainablestimulativetrustworthymelioration

12 Letter Words

hard-hittingameliorativeprophylacticadvantageoussatisfactoryeffectualityrejuvenativeameliorationilluminativepreventativeeffectatious

13 Letter Words

effectivenessinefficaciousimplementableindispensableadministrablenonbeneficialtherapeuticalinfluenceableevidencebasedcosteffectivecounteractiveantiinfectiveinterventions

14 Letter Words

tranquillizingtransformativeacceptablenessantiphlogistic

15 Letter Words

therapeuticallyunobjectionablecharacterizabletoxicologically

16 Letter Words

phytotherapeutic

17 Letter Words

pharmacologically

Using this list of similar-meaning words, you can choose the best synonyms to replace efficacious in your sentences.

Additionally, you'll find antonyms included, perfect for when you need the complete opposite meaning of efficacious in your writing.