fasciculus vs fascicle

fasciculus and fascicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
fasciculus	Yes	No	No	No
fascicle	Yes	No	No	No

As nouns, fasciculus and fascicle are synonyms defined as:

Other synonyms of fasciculus include fiber bundle, fibre bundle.

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