antiquity vs Roman

antiquity and Roman both are nouns.

Word	Noun	Adjective	Verb	Adverb
antiquity	Yes	No	No	No
Roman	Yes	Yes	No	No

antiquity (noun)	Roman (noun)
an artifact surviving from the past	a resident of modern Rome
extreme oldness	an inhabitant of the ancient Roman Empire
the historic period preceding the Middle Ages in Europe

antiquity (adjective)	Roman (adjective)
	of or relating to or supporting Romanism
	of or relating to or derived from Rome (especially ancient Rome)
	characteristic of the modern type that most directly represents the type used in ancient Roman inscriptions