modified
effective, effectual, efficient, productive; see effective. See syn. study at effective.
See efficacious in Webster's New World Roget's A-Z Thesaurus II
Producing or able to produce a desired effect:
Learn more about efficacious
» efficacious sentence examples
Also Mentioned In
» active
» bile
» deodorant
» dural
» effective
» first-generation
» hypnotic
» inefficacious
» osteoporosis
» roll-on
» more results...
Browse entries near efficacious
EFFGRO
EFFI
EFFI Bulletin
EFFIC
efficacious
efficaciously
efficaciousness
efficacy
efficacy (synonyms)
efficiencies