optic radiation vs nerve tract

optic radiation and nerve tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
optic radiation	Yes	No	No	No
nerve tract	Yes	No	No	No

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

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

Other hypernyms of optic radiation include nerve pathway, pathway, tract.

optic radiation (noun)	nerve 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