Allentown vs urban center

Allentown and urban center both are nouns.

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

Allentown (noun)	urban center (noun)
a city in eastern Pennsylvania; an industrial and commercial center	a large and densely populated urban area; may include several independent administrative districts