The Collaborative International Dictionary of English v.0.48:
Curability \Cur`a*bil"i*ty\ (k?r`?-b?l"?-t?), n. The state of being curable; curableness. [1913 Webster]WordNet (r) 3.0 (2006):
curability n 1: capability of being cured or healed [syn: curability, curableness] [ant: incurability, incurableness]