The Collaborative International Dictionary of English v.0.48:

-ways \-ways\
   A suffix formed from way by the addition of the adverbial -s
   (see -wards). It is often used interchangeably with wise;
   as, endways or endwise; noways or nowise, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ways
    n 1: structure consisting of a sloping way down to the water
         from the place where ships are built or repaired [syn:
         ways, shipway, slipway]