metropolis vs Philippopolis

metropolis and Philippopolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Philippopolis	Yes	No	No	No

metropolis (noun)	Philippopolis (noun)
people living in a large densely populated municipality	an ancient city in southern Bulgaria; commercial center of an agricultural region
a large and densely populated urban area; may include several independent administrative districts