northwestward

from WordNet (r) 3.0 (2006)

northwestward
    adv 1: in a northwestward direction [syn: {northwestward},
           {northwestwardly}]
    adj 1: toward the northwest
    n 1: the compass point midway between north and west; at 315
         degrees [syn: {northwest}, {nor'-west}, {northwestward},
         {NW}]

from The Collaborative International Dictionary of English v.0.48

Northwestward \North`west"ward\, Northwestwardly
\North`west"ward*ly\, adv.
   Toward the northwest.
   [1913 Webster]