Tijuana vs metropolis

Tijuana and metropolis both are nouns.

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

Tijuana (noun)	metropolis (noun)
a Mexican city just to the south of San Diego on the Lower California peninsula; popular among American tourists for racetracks and bullfights	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts