noun (n)

• moral perversion; impairment of virtue and moral principles(noun.attribute)

  Example:
  Its brothels, its opium parlors, its depravity.
  

  Synonym:
  corruption, degeneracy, depravation, putrefaction
  

  source: wordnet30
• a corrupt or depraved or degenerate act or practice(noun.act)

  Synonym:
  turpitude
  

  source: wordnet30
• The state of being depraved or corrupted; a vitiated state of moral character; general badness of character; wickedness of mind or heart; absence of religious feeling and principle.(noun)

  source: webster1913