Soledad vs urban center

Soledad and urban center both are nouns.

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

Soledad (noun)	urban center (noun)
a city in northern Colombia; a suburb of Barranquilla	a large and densely populated urban area; may include several independent administrative districts