Synonyms for Southwestward (same or very similar meaning)
WordNet sense 1 (the compass point midway between south and west; at 225 degrees):
southwest, sou'-west, SWWordNet sense 2 (situated in or facing or moving toward or coming from the south):
southWordNet sense 3 (in a southwestward direction):
southwestwardlyFrom the ODE community, based on WordNetadd/edit