The Collaborative International Dictionary of English v.0.48:

Shipwright \Ship"wright`\, n.
   One whose occupation is to construct ships; a builder of
   ships or other vessels.
   [1913 Webster]

WordNet (r) 3.0 (2006):

shipwright
    n 1: a carpenter who helps build and launch wooden vessels [syn:
         shipwright, shipbuilder, ship builder]