noun (n)

• a positive feeling of wanting to push ahead with something(noun.feeling)

  Synonym:
  avidity, avidness, keenness
  

  source: wordnet30
• prompt willingness(noun.attribute)

  Example:
  They showed no eagerness to spread the gospel.
  

  Synonym:
  forwardness, readiness, zeal
  

  source: wordnet30
• The state or quality of being eager; ardent desire.(noun)

  source: webster1913