urban center vs Kharkiv

urban center and Kharkiv both are nouns.

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

urban center (noun)	Kharkiv (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northeastern Ukraine; former capital of the Ukraine