city vs Dubai

city and Dubai both are nouns.

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

city (noun)	Dubai (noun)
people living in a large densely populated municipality	port city in the United Arab Emirates on the Persian Gulf
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter