noun (n)

• a state characterized by foul or disgusting dirt and refuse(noun.state)

  Synonym:
  filth, filthiness, foulness
  

  source: wordnet30
• malevolence by virtue of being malicious or spiteful or nasty(noun.attribute)

  Synonym:
  bitchiness, cattiness, spite, spitefulness
  

  source: wordnet30
• the quality of being unpleasant(noun.attribute)

  Example:
  I flinched at the nastiness of his wound.
  

  Synonym:
  unpleasingness
  Antonym:
  niceness
  

  source: wordnet30
• The quality or state of being nasty; extreme filthness; dirtiness; also, indecency; obscenity.(noun)

  source: webster1913