Czestochowa vs urban center

Czestochowa and urban center both are nouns.

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

Czestochowa (noun)	urban center (noun)
a city of southern Poland whose church contains the statue of the black Madonna which attracts many pilgrims	a large and densely populated urban area; may include several independent administrative districts