Republic of Poland vs Europe

Republic of Poland and Europe both are nouns.

Word	Noun	Adjective	Verb	Adverb
Republic of Poland	Yes	No	No	No
Europe	Yes	No	No	No

Republic of Poland (noun)	Europe (noun)
a republic in central Europe; the invasion of Poland by Germany in 1939 started World War II	an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members
	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