noun (n)

• an irritable petulant feeling(noun.feeling)

  Synonym:
  choler, crossness, fretfulness, fussiness, peevishness, petulance
  

  source: wordnet30
• excessive sensitivity of an organ or body part(noun.cognition)

  Synonym:
  excitability
  

  source: wordnet30
• a disposition to exhibit uncontrolled anger(noun.attribute)

  Synonym:
  biliousness, peevishness, pettishness, snappishness, surliness, temper
  

  source: wordnet30
• The state or quality of being irritable; quick excitability; petulance; fretfulness; as, irritability of temper.(noun)

  source: webster1913