Europe vs Eire

Europe and Eire both are nouns.

Word	Noun	Adjective	Verb	Adverb
Europe	Yes	No	No	No
Eire	Yes	No	No	No

Europe (noun)	Eire (noun)
an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members	a republic consisting of 26 of 32 counties comprising the island of Ireland; achieved independence from the United Kingdom in 1921
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