changeability

from 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}]

from The Collaborative International Dictionary of English v.0.48

Changeability \Change`a*bil"i*ty\, n.
   Changeableness.
   [1913 Webster]