efficacy
- noun (n)
Meaning: efficiency productiveness
Synonyms:
ability
adequacy
capability
capableness
capacity
competence
effect
effectiveness
efficaciousness
energy
force
influence
performance
potency
power
strength
success
sufficiency
use
vigor
virtue
weight
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.