noun (n)

• concern with the distinction between good and evil or right and wrong; right or good conduct(noun.attribute)

  Antonym:
  immorality
  

  source: wordnet30
• motivation based on ideas of right and wrong(noun.motive)

  Synonym:
  ethical motive, ethics, morals
  

  source: wordnet30
• The relation of conformity or nonconformity to the moral standard or rule; quality of an intention, a character, an action, a principle, or a sentiment, when tried by the standard of right.(noun)

  source: webster1913