city vs Ann Arbor

city and Ann Arbor both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
Ann Arbor	Yes	No	No	No

city (noun)	Ann Arbor (noun)
people living in a large densely populated municipality	a city in southern Michigan near Detroit; site of the University of Michigan
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter