urban center vs Goma

urban center and Goma both are nouns.

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

urban center (noun)	Goma (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in eastern Congo at the northern end of Lake Kivu near the border with Rwanda