noun (n)

• tanned skin of a sheep with the fleece left on; used for clothing(noun.substance)

  Synonym:
  fleece
  

  source: wordnet30
• skin of a sheep or goat prepared for writing on(noun.substance)

  Synonym:
  lambskin, parchment
  

  source: wordnet30
• a document certifying the successful completion of a course of study(noun.communication)

  Synonym:
  diploma
  

  source: wordnet30
• The skin of a sheep; or, leather prepared from it.(noun)

  source: webster1913