urban center vs Brest

urban center and Brest both are nouns.

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

urban center (noun)	Brest (noun)
a large and densely populated urban area; may include several independent administrative districts	a port city in northwestern France (in Brittany); the chief naval station of France