urban center vs Lyon

urban center and Lyon both are nouns.

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

urban center (noun)	Lyon (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in east-central France on the Rhone River; a principal producer of silk and rayon