city vs Stuttgart

city and Stuttgart both are nouns.

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

city (noun)	Stuttgart (noun)
people living in a large densely populated municipality	a city in southwestern Germany famous for innovative architecture
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter