urban center vs Sevilla

urban center and Sevilla both are nouns.

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

urban center (noun)	Sevilla (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in southwestern Spain; a major port and cultural center; the capital of bullfighting in Spain