urban center vs Santa Ana

urban center and Santa Ana both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Santa Ana	Yes	No	No	No

urban center (noun)	Santa Ana (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in southern California to the east of Long Beach
	a city in western El Salvador
	Mexican general who tried to crush the Texas revolt and who lost battles to Winfield Scott and Zachary Taylor in the Mexican War (1795-1876)
	a strong hot dry wind that blows in winter from the deserts of southern California toward the Pacific Coast