Samarang vs urban center

Samarang and urban center both are nouns.

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

Samarang (noun)	urban center (noun)
a port city is southern Indonesia; located in northern Java	a large and densely populated urban area; may include several independent administrative districts