city vs Barcelona

city and Barcelona both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
Barcelona	Yes	No	No	No

city (noun)	Barcelona (noun)
people living in a large densely populated municipality	a city in northeastern Spain on the Mediterranean; 2nd largest Spanish city and the largest port and commercial center; has been a center for radical political beliefs
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter