Ilion vs urban center

Ilion and urban center both are nouns.

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

Ilion (noun)	urban center (noun)
an ancient city in Asia Minor that was the site of the Trojan War	a large and densely populated urban area; may include several independent administrative districts