urban center vs Tuxtla Gutierrez

urban center and Tuxtla Gutierrez both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Tuxtla Gutierrez	Yes	No	No	No

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