Northwest as a noun:
The compass point halfway between north and west, bearing 315, abbreviated as NW.
Northwest as an adjective:
Of or pertaining to the northwest; northwestern.
Northwest as an adjective:
Towards the northwest; northwestwards.
Northwest as an adjective:
From the northwest, northwesterly
Southwest as a noun:
The compass point halfway between south and west, specifically 225, abbreviated as SW.
Southwest as an adjective:
Of or pertaining to the southwest; southwestern.
Southwest as an adjective:
Towards the southwest, southwestwards, southwestern.
Southwest as an adjective:
From the southwest, southwesterly