Roma vs Roman

Roma and Roman both are nouns.

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

Roma (noun)	Roman (noun)
capital and largest city of Italy; on the Tiber; seat of the Roman Catholic Church; formerly the capital of the Roman Republic and the Roman Empire	a resident of modern Rome
a member of a people with dark skin and hair who speak Romany and who traditionally live by seasonal work and fortunetelling; they are believed to have originated in northern India but now are living on all continents (but mostly in Europe, North Africa, and North America)	an inhabitant of the ancient Roman Empire

Roma (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