noun (n)

• intense feelings of suffering; acute mental or physical pain(noun.feeling)

  Example:
  An agony of doubt.
  

  Synonym:
  torment, torture
  

  source: wordnet30
• a state of acute pain(noun.state)

  Synonym:
  excruciation, suffering
  

  source: wordnet30
• Violent contest or striving.(noun)

  source: webster1913