Europe vs Western world

Europe and Western world both are nouns.

Word	Noun	Adjective	Verb	Adverb
Europe	Yes	No	No	No
Western world	Yes	No	No	No

Europe (noun)	Western world (noun)
an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members	the countries of (originally) Europe and (now including) North America and South America
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