commissure vs nerve pathway

commissure and nerve pathway both are nouns.

Word	Noun	Adjective	Verb	Adverb
commissure	Yes	No	No	No
nerve pathway	Yes	No	No	No

As nouns, nerve pathway is a hypernym of commissure; that is, nerve pathway is a word with a broader meaning than commissure:

commissure: a bundle of nerve fibers passing from one side to the other of the brain or spinal cord
nerve pathway: a bundle of myelinated nerve fibers following a path through the brain

Other hypernyms of commissure include nerve tract, pathway, tract.

commissure (noun)	nerve pathway (noun)
a bundle of nerve fibers passing from one side to the other of the brain or spinal cord	a bundle of myelinated nerve fibers following a path through the brain