Europe vs Northern Ireland

Europe and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
Europe	Yes	No	No	No
Northern Ireland	Yes	No	No	No

Europe (noun)	Northern Ireland (noun)
an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members	a division of the United Kingdom located on the northern part of the island of Ireland
the nations of the European continent collectively
the 2nd smallest continent (actually a vast peninsula of Eurasia); the British use `Europe' to refer to all of the continent except the British Isles