noun (n)

• a courteous manner that respects accepted social usage(noun.attribute)

  Synonym:
  politeness
  Antonym:
  impoliteness
  

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

  Antonym:
  nastiness
  

  source: wordnet30
• the quality of being difficult to detect or analyze(noun.attribute)

  Synonym:
  subtlety
  

  source: wordnet30
• Quality or state of being nice.(noun)

  source: webster1913