Northern Mariana Islands vs territory

Northern Mariana Islands and territory both are nouns.

Word	Noun	Adjective	Verb	Adverb
Northern Mariana Islands	Yes	No	No	No
territory	Yes	No	No	No

Northern Mariana Islands (noun)	territory (noun)
a self-governing territory comprising all of the Mariana Islands except Guam	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