Tours vs metropolis

Tours and metropolis both are nouns.

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

Tours (noun)	metropolis (noun)
an industrial city in western France on the Loire River	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts