noun (n)

• being mixed with extraneous material; the product of adulterating(noun.state)

  Synonym:
  adulteration
  

  source: wordnet30
• changing to a lower state (a less respected state)(noun.act)

  Synonym:
  degradation
  

  source: wordnet30
• The act of debasing or the state of being debased.(noun)

  source: webster1913