impermanence

from WordNet (r) 3.0 (2006)

impermanence
    n 1: the property of not existing for indefinitely long
         durations [syn: {impermanence}, {impermanency}] [ant:
         {permanence}, {permanency}]

from The Collaborative International Dictionary of English v.0.48

Impermanence \Im*per"ma*nence\, Impermanency \Im*per"ma*nen*cy\,
   n.
   Lack of permanence.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

38 Moby Thesaurus words for "impermanence":
      adaptability, adjustability, alterability, caducity, changeability,
      changeableness, changefulness, corruptibility, death, ephemerality,
      ephemeralness, evanescence, finitude, fleetingness, flexibility,
      fluidity, fugacity, impermanency, instability, malleability,
      mobility, modifiability, momentariness, mortality, movability,
      mutability, nonuniformity, perishability, permutability,
      plasticity, resilience, rubberiness, suppleness, transience,
      transiency, transientness, transitoriness, volatility