Dobrich vs urban center

Dobrich and urban center both are nouns.

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

Dobrich (noun)	urban center (noun)
a city in northeastern Bulgaria (north of Varna) that is the commercial center of an agricultural region	a large and densely populated urban area; may include several independent administrative districts