metropolis vs Rawalpindi

metropolis and Rawalpindi both are nouns.

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

metropolis (noun)	Rawalpindi (noun)
people living in a large densely populated municipality	an ancient city in northeastern Pakistan; served as capital of Pakistan while Islamabad was being built
a large and densely populated urban area; may include several independent administrative districts