Roman Empire vs Europe

Roman Empire and Europe both are nouns.

Word	Noun	Adjective	Verb	Adverb
Roman Empire	Yes	No	No	No
Europe	Yes	No	No	No

Roman Empire (noun)	Europe (noun)
an empire established by Augustus in 27 BC and divided in AD 395 into the Western Roman Empire and the eastern or Byzantine Empire; at its peak lands in Europe and Africa and Asia were ruled by ancient Rome	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