Roman vs Rome

Roman and Rome both are nouns.

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

Roman (noun)	Rome (noun)
a resident of modern Rome	the leadership of the Roman Catholic Church
an inhabitant of the ancient Roman Empire	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

Roman (adjective)	Rome (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