Tuxtla Gutierrez vs metropolis

Tuxtla Gutierrez and metropolis both are nouns.

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

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