city vs Waterford

city and Waterford both are nouns.

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

city (noun)	Waterford (noun)
people living in a large densely populated municipality	a port city in southern Ireland; famous for glass industry
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter