subdivision vs tract

subdivision and tract both are nouns.

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

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

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

subdivision (noun)	tract (noun)
the act of subdividing; division of something previously divided	a bundle of myelinated nerve fibers following a path through the brain
a section of a section; a part of a part; i.e., a part of something already divided	a system of body parts that together serve some particular purpose
a self-contained part of a larger composition (written or musical)	a brief treatise on a subject of interest; published in the form of a booklet
a division of some larger or more complex organization	an extended area of land
an area composed of subdivided lots