city vs Brighton

city and Brighton both are nouns.

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

city (noun)	Brighton (noun)
people living in a large densely populated municipality	a city in East Sussex in southern England that is a popular resort; site of the University of Sussex
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter