Gorky vs urban center

Gorky and urban center both are nouns.

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

Gorky (noun)	urban center (noun)
an industrial city in the European part of Russia; birthplace of Maksim Gorky	a large and densely populated urban area; may include several independent administrative districts
Russian writer of plays and novels and short stories; noted for his depiction of social outcasts