Synonyms and Antonyms for Efficacious

Following is a list of 200 synonym words and phrases that are related to efficacious:

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4 Letter Words

safegoodable

5 Letter Words

adept

6 Letter Words

potentusefulrobustviablesafestfecundcogentformalactive

7 Letter Words

tellingskilfuldurableworkingcapableformfulbeneficskilledenergic

8 Letter Words

efficacycurativereliablefeasibleworkablesanativeamenablesalutaryadequatenontoxicvirtuouslaudableskillfulfruitfulsuitablepowerfulremedialavailingspeedfuleloquentavailfulevinciveexertiveforcibleforceful

9 Letter Words

effectualeffectivetrenchantimpellingefficienteminentlyexpedienthealthfulantidotalpromotiveaffectiveequitableimpactfuldesirablecompetentpracticalpromisingagreeableimpactivetolerableopportunefoolproofcongruoushonorableefficiousoperativeenergeticavailableeffectingresultfulappliablepowerableexistableenactableexecutivepotentialoperatoryin effect

10 Letter Words

impressiveefficiencysuccessfulbeneficialefficacityalterativebeneficentadjunctiveeradicableaffordableprofitableunamenablepreventiveconvenientacceptableefficaciesachievableliberativeinnovativeutilizablerealizableclinicallymeaningfulinhibitivesalubriousconsistentredemptiverewardablepropitioushonourablereplicableinefficacydissuasiveacceptablyvitalizingeffectuouseffectibleperficientequipotentconvincing

11 Letter Words

effectivelyefficientlyalleviativeineffectivealterativesmeritoriousexpeditiousimplementaltherapeuticsynergisticbeneficientpracticableintegrativeinexpensiverestorativeserviceablesupportablealternativesustainablestimulativetrustworthymeliorationoperationalinformativeenforceableinfluentialbenefitableapplicative

12 Letter Words

hard-hittingameliorativeprophylacticadvantageoussatisfactoryeffectualityrejuvenativeameliorationilluminativepreventativeeffectatiousbioeffectiveaccomplishedformalizable

13 Letter Words

effectivenessinefficaciousimplementableindispensableadministrablenonbeneficialtherapeuticalinfluenceableevidencebasedcosteffectivecounteractiveantiinfectiveinterventionsequieffectiveeffervesciblesuperpowerful

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.