playing area vs tract

playing area and tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
playing area	Yes	No	No	No
tract	Yes	No	No	No

As nouns, tract is a hypernym of playing area; that is, tract is a word with a broader meaning than playing area:

Other hypernyms of playing area include parcel, parcel of land, piece of ground, piece of land.

playing area (noun)	tract (noun)
a piece of land prepared for playing a game	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