noun (n)

• an irrational but irresistible motive for a belief or action(noun.motive)

  Synonym:
  cacoethes, passion
  

  source: wordnet30
• a mood disorder; an affective disorder in which the victim tends to respond excessively and sometimes violently(noun.state)

  Synonym:
  manic disorder
  

  source: wordnet30
• Violent derangement of mind; madness; insanity. Cf. Delirium.(noun)

  source: webster1913