radiatio optica vs tract

radiatio optica and tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiatio optica	Yes	No	No	No
tract	Yes	No	No	No

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

radiatio optica: a nerve pathway from the lateral geniculate body to the visual cortex
tract: a bundle of myelinated nerve fibers following a path through the brain

Other hypernyms of radiatio optica include nerve pathway, nerve tract, pathway.

radiatio optica (noun)	tract (noun)
a nerve pathway from the lateral geniculate body to the visual cortex	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