noun (n)

• intensity or forcefulness of expression(noun.attribute)

  Example:
  The vehemence of his denial.
  

  Synonym:
  emphasis
  

  source: wordnet30
• the property of being wild or turbulent(noun.attribute)

  Synonym:
  ferocity, fierceness, furiousness, fury, violence, wildness
  

  source: wordnet30
• The quality pr state of being vehement; impetuous force; impetuosity; violence; fury; as, the vehemence.(noun)

  source: webster1913