city vs public square

city and public square both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
public square	Yes	No	No	No

city (noun)	public square (noun)
people living in a large densely populated municipality	a place of assembly for the people in ancient Greece
a large and densely populated urban area; may include several independent administrative districts	an open area at the meeting of two or more streets
an incorporated administrative district established by state charter