capableness > define
noun
- An aptitude that may be developed.
- synonyms: capability, potentiality
- The quality of being capable - physically or intellectually or legally.
- usage: "he worked to the limits of his capability"
- synonyms: capability
by WordNet 3.0 © 2006 by Princeton University
(n.) The quality or state of being capable; capability; adequateness; competency.
by Webster's Revised Unabridged Dictionary