The Collaborative International Dictionary of English v.0.48:

Furtherance \Fur"ther*ance\, n.
   The act of furthering or helping forward; promotion;
   advancement; progress.
   [1913 Webster]

         I know that I shall abide and continue with you all for
         your
         furthersnce and joy of faith.            --Phil. i. 25.
   [1913 Webster]

         Built of furtherance and pursuing, Not of spent deeds,
         but of doing.                            --Emerson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

furtherance
    n 1: encouragement of the progress or growth or acceptance of
         something [syn: promotion, furtherance, advancement]
    2: the advancement of some enterprise; "his experience in
       marketing resulted in the forwarding of his career" [syn:
       forwarding, furtherance, promotion]