fascicle vs fibre bundle

fascicle and fibre bundle both are nouns.

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

As nouns, fascicle and fibre bundle are synonyms defined as:

Other synonyms of fascicle include fasciculus, fiber bundle.

fascicle (noun)	fibre bundle (noun)
a bundle of fibers (especially nerve fibers)	a bundle of fibers (especially nerve fibers)
an installment of a printed work