noun (n)

• the power of retaining and recalling past experience(noun.cognition)

  Synonym:
  memory, retention, retentiveness
  

  source: wordnet30
• the property of retaining possessions that have been acquired(noun.attribute)

  Synonym:
  retentiveness
  

  source: wordnet30
• the power of retaining liquid(noun.attribute)

  Example:
  Moisture retentivity of soil.
  

  Synonym:
  retention, retentiveness
  

  source: wordnet30
• The power of retaining; retentive force; as, the retentivity of a magnet.(noun)

  source: webster1913