Roman Empire vs ancients

Roman Empire and ancients both are nouns.

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

Roman Empire (noun)	ancients (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	people who lived in times long past (especially during the historical period before the fall of the Roman Empire in western Europe)