parkland vs tract

parkland and tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
parkland	Yes	No	No	No
tract	Yes	No	No	No

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

parkland: a large area of land preserved in its natural state as public property
tract: an extended area of land

Other hypernyms of parkland include parcel, parcel of land, piece of ground, piece of land.

parkland (noun)	tract (noun)
a large area of land preserved in its natural state as public property	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