Santa Clara vs metropolis

Santa Clara and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Santa Clara	Yes	No	No	No
metropolis	Yes	No	No	No

Santa Clara (noun)	metropolis (noun)
a city of west central California; residential area with light industry	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts