Strasbourg vs metropolis

Strasbourg and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Strasbourg	Yes	No	No	No
metropolis	Yes	No	No	No

Strasbourg (noun)	metropolis (noun)
city on the Rhine in eastern France near the German border; an inland port	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts