The Collaborative International Dictionary of English v.0.48:
Adaptability \A*dapt`a*bil"i*ty\, Adaptableness \A*dapt"a*ble*ness\, n. The quality of being adaptable; suitableness. "General adaptability for every purpose." --Farrar. [1913 Webster]WordNet (r) 3.0 (2006):
adaptability n 1: the ability to change (or be changed) to fit changed circumstances [ant: unadaptability]