The Collaborative International Dictionary of English v.0.48:
Changeability \Change`a*bil"i*ty\, n. Changeableness. [1913 Webster]WordNet (r) 3.0 (2006):
changeability n 1: the quality of being changeable; having a marked tendency to change; "the changeableness of the weather" [syn: changeableness, changeability] [ant: changelessness, unchangeability, unchangeableness, unchangingness]