noun (n)

• a personal or social separation (as between opposing factions)(noun.event)

  Synonym:
  breach, break, falling out, rift, rupture
  

  source: wordnet30
• the act of severing(noun.act)

  Synonym:
  severing
  

  source: wordnet30
• The act of severing, or the state of being severed; partition; separation.(noun)

  source: webster1913