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Efficacy
noun
/ˈɛf.ɪ.kə.si/
Word Frequency:
10.2
Definitions
1.
noun
Ability to produce a desired effect under ideal testing conditions.
2.
noun
Degree of ability to produce a desired effect.
Synonyms
efficacity
efficaciousness
efficacious
effective
effectiveness
usefulness
utility
efficiency
efficient
effect
adequacy
validity
Rhymes With
assay
brassy
sassy
chassis
classy
glassy
profligacy
cassie
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