urban center vs Ho Chi Minh City

urban center and Ho Chi Minh City both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Ho Chi Minh City	Yes	No	No	No

urban center (noun)	Ho Chi Minh City (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in South Vietnam; formerly (as Saigon) it was the capital of French Indochina