advancer

from WordNet (r) 3.0 (2006)

advancer
    n 1: someone who advances

from The Collaborative International Dictionary of English v.0.48

Advancer \Ad*van"cer\, n.
   1. One who advances; a promoter.
      [1913 Webster]

   2. A second branch of a buck's antler. --Howell.
      [1913 Webster]