metropolis vs Tuxtla Gutierrez

metropolis and Tuxtla Gutierrez both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Tuxtla Gutierrez	Yes	No	No	No

metropolis (noun)	Tuxtla Gutierrez (noun)
people living in a large densely populated municipality	a city in southeastern Mexico
a large and densely populated urban area; may include several independent administrative districts