nervus vs fibre bundle

nervus and fibre bundle both are nouns.

Word	Noun	Adjective	Verb	Adverb
nervus	Yes	No	No	No
fibre bundle	Yes	No	No	No

As nouns, fibre bundle is a hypernym of nervus; that is, fibre bundle is a word with a broader meaning than nervus:

nervus: any bundle of nerve fibers running to various organs and tissues of the body
fibre bundle: a bundle of fibers (especially nerve fibers)

Other hypernyms of nervus include fascicle, fasciculus, fiber bundle.

nervus (noun)	fibre bundle (noun)
any bundle of nerve fibers running to various organs and tissues of the body	a bundle of fibers (especially nerve fibers)