city vs Feliz Lusitania

city and Feliz Lusitania both are nouns.

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

city (noun)	Feliz Lusitania (noun)
people living in a large densely populated municipality	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
an incorporated administrative district established by state charter