Philippi vs urban center

Philippi and urban center both are nouns.

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

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