northern vs septrional

northern and septrional both are adjectives.

Word	Noun	Adjective	Verb	Adverb
northern	No	Yes	No	No
septrional	No	Yes	No	No

northern (adjective)	septrional (adjective)
situated in regions of the north	of northern regions; from the seven stars (or seven plowing oxen) of Ursa Major
in or characteristic of a region of the United States north of (approximately) the Mason-Dixon line
coming from the north; used especially of wind
oriented toward the north