Nouns

(n)southwest, sou'-west, southwestward, SWthe compass point midway between south and west; at 225 degrees
(n)southwestthe direction corresponding to the southwestward compass point
(n)southwesta location in the southwestern part of a country, region, or city

Adjectives

(s)southwesterly, southwestcoming from the southwest“the winds are southwesterly”
(s)southwest, southwestern, southwesterlysituated in or oriented toward the southwest

Adverbs

(r)southwest, south-west, sou'westto, toward, or in the southwest