Patrai vs metropolis

Patrai and metropolis both are nouns.

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

Patrai (noun)	metropolis (noun)
a port city in western Greece in the northwestern Peloponnese on an inlet of the Ionian Sea; was a major trade center from the 5th century BC to the 3rd century BC; commercial importance revived during the Middle Ages	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts