Synonyms for Northwestward (same or very similar meaning)
WordNet sense 1 (the compass point midway between north and west; at 315 degrees):
northwest, nor'-west, NWWordNet sense 2 (situated in or facing or moving toward or coming from the north):
northWordNet sense 3 (in a northwestward direction):
northwestwardlyFrom the ODE community, based on WordNetadd/edit