Donetsk vs urban center

Donetsk and urban center both are nouns.

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

Donetsk (noun)	urban center (noun)
an industrial city in the Donets Basin	a large and densely populated urban area; may include several independent administrative districts