Al Madinah vs metropolis

Al Madinah and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Al Madinah	Yes	No	No	No
metropolis	Yes	No	No	No

Al Madinah (noun)	metropolis (noun)
a city in western Saudi Arabia; site of the tomb of Muhammad; the second most holy city of Islam	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts