circumboreal vs boreal

circumboreal and boreal both are adjectives.

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

As adjectives, circumboreal and boreal are synonyms defined as:

circumboreal (adjective)	boreal (adjective)
comprising or throughout far northern regions	toward or located in the north
	relating to or marked by qualities associated with the north wind
	comprising or throughout far northern regions