mutability

mutability
    n 1: the quality of being capable of mutation [syn:
         {mutability}, {mutableness}] [ant: {fixity},
         {immutability}, {immutableness}]
    

Mutability \Mu`ta*bil"i*ty\, n. [L. mutabilitas: cf. F.
   mutabilit['e].]
   The quality of being mutable, or subject to change or
   alteration, either in form, state, or essential character;
   susceptibility of change; changeableness; inconstancy;
   variation.
   [1913 Webster]

         Plato confessed that the heavens and the frame of the
         world are corporeal, and therefore subject to
         mutability.                              --Stillingfleet.
   [1913 Webster]
    

72 Moby Thesaurus words for "mutability":
      adaptability, adjustability, alterability, caducity,
      capriciousness, changeability, changeableness, changefulness,
      choppiness, corruptibility, dappleness, death, deviation,
      difference, differentiation, disorder, divarication, divergence,
      diversification, ephemerality, ephemeralness, evanescence,
      finitude, fleetingness, flexibility, fluidity, fugacity,
      impermanence, impermanency, inconsistency, inconstancy, inequality,
      instability, irregularity, jerkiness, malleability, mercuriality,
      mobility, modifiability, momentariness, mortality, motleyness,
      movability, nonconformism, nonconformity, nonstandardization,
      nonuniformity, perishability, permutability, plasticity, pluralism,
      raggedness, resilience, rubberiness, suppleness, transience,
      transiency, transientness, transitoriness, unconformism,
      unconformity, unevenness, unorthodoxy, unsteadiness, variability,
      variation, variegation, variety, variousness, versatility,
      volatility, wavering