urban center vs Homel

urban center and Homel both are nouns.

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

urban center (noun)	Homel (noun)
a large and densely populated urban area; may include several independent administrative districts	industrial city of Belarus to the southeast of Minsk