Zomba vs urban center

Zomba and urban center both are nouns.

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

Zomba (noun)	urban center (noun)
a city in southern Malawi; was the capital until 1971	a large and densely populated urban area; may include several independent administrative districts