Roman vs antiquity

Roman and antiquity both are nouns.

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

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

Roman (adjective)	antiquity (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