Synonyms for efficacious

• (adj) effective (similar term), effective (related term), effectual (related term), efficacious (related term), inefficacious (antonym)
  
  
• (adj) effective, effectual, hard-hitting (similar term), trenchant (similar term), impelling (similar term), impressive (similar term), telling (similar term), rough-and-ready (similar term), efficacious (related term), efficient (related term), potent (related term), strong (related term), stiff (related term), powerful (related term), useful (related term), utile (related term), ineffective (antonym)
  
  

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