urban center vs Constantine

urban center and Constantine both are nouns.

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

urban center (noun)	Constantine (noun)
a large and densely populated urban area; may include several independent administrative districts	a walled city in northeastern Algeria to the east of Algiers; was destroyed in warfare in the 4th century and rebuilt by Constantine I
	Emperor of Rome who stopped the persecution of Christians and in 324 made Christianity the official religion of the Roman Empire; in 330 he moved his capital from Rome to Byzantium and renamed it Constantinople (280-337)