urban center vs Guantanamo

urban center and Guantanamo both are nouns.

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

urban center (noun)	Guantanamo (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in southeastern Cuba; site of a United States naval base