Maracaibo vs urban center

Maracaibo and urban center both are nouns.

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

Maracaibo (noun)	urban center (noun)
a port city in northwestern Venezuela; a major oil center	a large and densely populated urban area; may include several independent administrative districts