San Jose vs metropolis

San Jose and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
San Jose	Yes	No	No	No
metropolis	Yes	No	No	No

San Jose (noun)	metropolis (noun)
the capital and largest city of Costa Rica	people living in a large densely populated municipality
a city in western California located at the southern end of San Francisco Bay to the south of San Francisco; a center for computer and electronics industries	a large and densely populated urban area; may include several independent administrative districts