northern vs Federal

northern is not a noun while Federal is a noun.

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

northern (noun)	Federal (noun)
	any federal law-enforcement officer
	a member of the Union Army during the American Civil War

northern (adjective)	Federal (adjective)
situated in regions of the north	being of or having to do with the northern United States and those loyal to the Union during the American Civil War
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