The Collaborative International Dictionary of English v.0.48:

canoeist \ca*noe"ist\ (k[.a]*n[=oo]"[i^]st), n.
   A canoeman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

canoeist
    n 1: someone paddling a canoe [syn: canoeist, paddler]