SYNONYMS AND RELATED EXPRESSIONS
efficacy
noun
The ability to produce an intended result.
Local English device voice, when available. This is not a recorded dictionary pronunciation.
Capacity to produce a result
Closest synonyms
Related words and expressions
These extend or explain the idea and may require a different sentence structure.
Usage distinction
Return to topEfficacy concerns achieving the effect; efficiency concerns the resources used to achieve it.
CHECK THE MEANING IN CONTEXT
See efficacy in use
The team tested the efficacy of its new sorting method.
A fictional stationery shop tested the efficacy of a new collection shelf by observing whether customers could find prepaid orders more easily.
Compare an alternative with the original word in each passage. Shared meanings do not make every pair interchangeable.
Synonym reference scope and sources
The groups distinguish the senses selected for this study entry. Closest synonyms and broader related expressions have separate labels. The listed sources support lexical selection; not every phrase is a direct quotation from a source.
How the synonym reference was prepared / WordNet 3.0 license