Nouns

(n)northwestthe direction corresponding to the northwestward compass point
(n)northwest, nor'-west, northwestward, NWthe compass point midway between north and west; at 315 degrees
(n)northwesta location in the northwestern part of a country, region, or city

Adjectives

(s)northwestern, northwesterly, northwestsituated in or oriented toward the northwest
(s)northwesterly, northwestcoming from the northwest“northwesterly winds”

Adverbs

(r)northwest, north-west, nor'-westto, toward, or in the northwest