metropolis vs Puebla

metropolis and Puebla both are nouns.

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

metropolis (noun)	Puebla (noun)
people living in a large densely populated municipality	a city in south central Mexico (southeast of Mexico City) on the edge of central Mexican plateau
a large and densely populated urban area; may include several independent administrative districts