southwestward vs compass point

southwestward and compass point both are nouns.

Word	Noun	Adjective	Verb	Adverb
southwestward	Yes	Yes	No	Yes
compass point	Yes	No	No	No

As nouns, compass point is a hypernym of southwestward; that is, compass point is a word with a broader meaning than southwestward:

southwestward: the compass point midway between south and west; at 225 degrees
compass point: any of 32 horizontal directions indicated on the card of a compass

Other hypernyms of southwestward include point.

southwestward (noun)	compass point (noun)
the compass point midway between south and west; at 225 degrees	any of 32 horizontal directions indicated on the card of a compass

southwestward (adjective)	compass point (adjective)
toward the southwest

southwestward (adverb)	compass point (adverb)
in a southwestward direction