Bam vs urban center

Bam and urban center both are nouns.

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

Bam (noun)	urban center (noun)
an ancient city in southeastern Iran; destroyed by an earthquake in 2003	a large and densely populated urban area; may include several independent administrative districts