piece of land vs tract

piece of land and tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
piece of land	Yes	No	No	No
tract	Yes	No	No	No

As nouns, piece of land and tract are synonyms defined as:

Other synonyms of piece of land include parcel, parcel of land, piece of ground.

piece of land (noun)	tract (noun)
an extended area of land	a bundle of myelinated nerve fibers following a path through the brain
	a system of body parts that together serve some particular purpose
	a brief treatise on a subject of interest; published in the form of a booklet
	an extended area of land