Feliz Lusitania vs metropolis

Feliz Lusitania and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Feliz Lusitania	Yes	No	No	No
metropolis	Yes	No	No	No

Feliz Lusitania (noun)	metropolis (noun)
port city in northern Brazil in the Amazon delta; main port and commercial center for the Amazon River basin	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts