Roman Empire vs Africa

Roman Empire and Africa both are nouns.

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

Roman Empire (noun)	Africa (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	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