Caloocan vs urban center

Caloocan and urban center both are nouns.

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

Caloocan (noun)	urban center (noun)
a suburb of Manila in southwestern Luzon	a large and densely populated urban area; may include several independent administrative districts