Feliz Lusitania vs urban center

Feliz Lusitania and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Feliz Lusitania	Yes	No	No	No
urban center	Yes	No	No	No

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