Africa vs Roman Empire

Africa and Roman Empire both are nouns.

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

Africa (noun)	Roman Empire (noun)
the second largest continent; located to the south of Europe and bordered to the west by the South Atlantic and to the east by the Indian Ocean	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