city vs Leipzig

city and Leipzig both are nouns.

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

city (noun)	Leipzig (noun)
people living in a large densely populated municipality	a city in southeastern Germany famous for fairs; formerly a music and publishing center
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter