Lubumbashi vs urban center

Lubumbashi and urban center both are nouns.

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

Lubumbashi (noun)	urban center (noun)
a city in southeastern Congo near the border with Zambia; a copper mining center; former name (until 1966) was Elisabethville	a large and densely populated urban area; may include several independent administrative districts