Yekaterinoslav vs urban center

Yekaterinoslav and urban center both are nouns.

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

Yekaterinoslav (noun)	urban center (noun)
city in east central Ukraine on the Dnieper River; center of metallurgical industry	a large and densely populated urban area; may include several independent administrative districts