city vs Dortmund

city and Dortmund both are nouns.

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

city (noun)	Dortmund (noun)
people living in a large densely populated municipality	an industrial city in northwestern Germany; flourished from the 13th to 17th century as a member of the Hanseatic League
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter