urban center vs Agra

urban center and Agra both are nouns.

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

urban center (noun)	Agra (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northern India; former capital of the Mogul empire; site of the Taj Mahal