Liege vs urban center

Liege and urban center both are nouns.

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

Liege (noun)	urban center (noun)
city in eastern Belgium; largest French-speaking city in Belgium	a large and densely populated urban area; may include several independent administrative districts