noun (n)

• disagreement among those expected to cooperate(noun.communication)

  Synonym:
  discord
  

  source: wordnet30
• a conflict of people's opinions or actions or characters(noun.state)

  Synonym:
  disagreement, dissonance
  Antonym:
  accord, agreement
  

  source: wordnet30
• Disagreement in opinion, usually of a violent character, producing warm debates or angry words; contention in words; partisan and contentious divisions; breach of friendship and union; strife; discord; quarrel.(noun)

  source: webster1913