noun
- Capable of serving a purpose well.
- usage: "software with greater functionality"
Functionality and Efficaciousness
WordNet 3.0 © 2006 by Princeton University
noun
- Capacity or power to produce a desired effect.
- usage: "concern about the safety and efficacy of the vaccine"
- synonyms: efficacy
WordNet 3.0 © 2006 by Princeton University