metropolis vs Tijuana

metropolis and Tijuana both are nouns.

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

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