borderland vs territory

borderland and territory both are nouns.

Word	Noun	Adjective	Verb	Adverb
borderland	Yes	No	No	No
territory	Yes	No	No	No

As nouns, territory is a hypernym of borderland; that is, territory is a word with a broader meaning than borderland:

borderland: district consisting of the area on either side of a border or boundary of a country or an area
territory: a region marked off for administrative or other purposes

Other hypernyms of borderland include district, dominion, territorial dominion.

borderland (noun)	territory (noun)
district consisting of the area on either side of a border or boundary of a country or an area	an area of knowledge or interest
	a region marked off for administrative or other purposes
	the geographical area under the jurisdiction of a sovereign state