impermanency
1. [ noun ] the property of not existing for indefinitely long durations
Synonyms: impermanence
Related terms: permanence duration mortality transience temporariness
Similar spelling:   impermanence
  impermanent
  imipramine
  imperforate
  impertinence
  improperness
  imperturbable
  impertinently
  imperviable
  impertinent
  impersonate
  impermeable
  impermeableness