Brest vs urban center

Brest and urban center both are nouns.

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

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