noun (n)

• permanence by virtue of the power to resist stress or force(noun.attribute)

  Example:
  They advertised the durability of their products.
  

  Synonym:
  enduringness, lastingness, strength
  

  source: wordnet30
• The state or quality of being durable; the power of uninterrupted or long continuance in any condition; the power of resisting agents or influences which tend to cause changes, decay, or dissolution; lastingness.(noun)

  source: webster1913