noun (n)

• the property of changing readily from a solid or liquid to a vapor(noun.attribute)

  source: wordnet30
• the trait of being unpredictably irresolute(noun.attribute)

  Example:
  The volatility of the market drove many investors away.
  

  Synonym:
  unpredictability
  

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

  Synonym:
  excitability, excitableness
  

  source: wordnet30