Long Beach vs urban center

Long Beach and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Long Beach	Yes	No	No	No
urban center	Yes	No	No	No

Long Beach (noun)	urban center (noun)
a city in southern California located on 8.5 miles of Pacific beachfront; was a resort until oil was discovered in 1921	a large and densely populated urban area; may include several independent administrative districts