urban center vs San Bernardino

urban center and San Bernardino both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
San Bernardino	Yes	No	No	No

urban center (noun)	San Bernardino (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in southern California to the east of Los Angeles