public square vs parcel of land

public square and parcel of land both are nouns.

Word	Noun	Adjective	Verb	Adverb
public square	Yes	No	No	No
parcel of land	Yes	No	No	No

As nouns, parcel of land is a hypernym of public square; that is, parcel of land is a word with a broader meaning than public square:

Other hypernyms of public square include parcel, piece of ground, piece of land, tract.

public square (noun)	parcel of land (noun)
a place of assembly for the people in ancient Greece	an extended area of land
an open area at the meeting of two or more streets