urban center vs Philippi

urban center and Philippi both are nouns.

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

urban center (noun)	Philippi (noun)
a large and densely populated urban area; may include several independent administrative districts	Octavian and Mark Antony defeated Brutus and Cassius in 42 BC
	a city in ancient Macedonia that was important in early Christianity