Europe vs Polska

Europe and Polska both are nouns.

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

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