metropolis vs Tampico

metropolis and Tampico both are nouns.

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

metropolis (noun)	Tampico (noun)
people living in a large densely populated municipality	a port city in eastern Mexico
a large and densely populated urban area; may include several independent administrative districts