Source : Webster's Revised Unabridged Dictionary (1913)

Eagerness \Ea"ger*ness\, n.
   1. The state or quality of being eager; ardent desire. ``The
      eagerness of love.'' --Addison.

   2. Tartness; sourness. [Obs.]

   Syn: Ardor; vehemence; earnestness; impetuosity; heartiness;
        fervor; fervency; avidity; zeal; craving; heat; passion;
        greediness.

Source : WordNet®

eagerness
     n : a positive feeling of wanting to push ahead with something
         [syn: {avidity}, {avidness}, {keenness}]