baseball diamond vs tract

baseball diamond and tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
baseball diamond	Yes	No	No	No
tract	Yes	No	No	No

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

baseball diamond: the area of a baseball field that is enclosed by 3 bases and home plate
tract: an extended area of land

Other hypernyms of baseball diamond include parcel, parcel of land, piece of ground, piece of land.

baseball diamond (noun)	tract (noun)
the area of a baseball field that is enclosed by 3 bases and home plate	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