urban center vs Guayaquil

urban center and Guayaquil both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Guayaquil	Yes	No	No	No

urban center (noun)	Guayaquil (noun)
a large and densely populated urban area; may include several independent administrative districts	the largest city of Ecuador