Brunn vs urban center

Brunn and urban center both are nouns.

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

Brunn (noun)	urban center (noun)
an industrial city in Moravia in Czech Republic to the southeast of Prague	a large and densely populated urban area; may include several independent administrative districts