northern vs boreal

northern and boreal both are adjectives.

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

northern (adjective)	boreal (adjective)
situated in regions of the north	toward or located in the north
in or characteristic of a region of the United States north of (approximately) the Mason-Dixon line	relating to or marked by qualities associated with the north wind
coming from the north; used especially of wind	comprising or throughout far northern regions
oriented toward the north