The Collaborative International Dictionary of English v.0.48:

Fencer \Fen"cer\, n.
   One who fences; one who teaches or practices the art of
   fencing with sword or foil.
   [1913 Webster]

         As blunt as the fencer's foils.          --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fencer
    n 1: someone skilled at fencing [syn: fencer, swordsman]