English to English

noun (n)

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

  Synonym:
  irritability
  

  source: wordnet30
• being easily excited(noun.attribute)

  Synonym:
  excitableness, volatility
  

  source: wordnet30
• The quality of being readily excited; proneness to be affected by exciting causes.(noun)

  source: webster1913