Chernobyl vs urban center

Chernobyl and urban center both are nouns.

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

Chernobyl (noun)	urban center (noun)
a city in north central Ukraine; site of a major disaster at a nuclear power plant (26 April 1986)	a large and densely populated urban area; may include several independent administrative districts