fasciculation vs vellication

fasciculation and vellication both are nouns.

Word	Noun	Adjective	Verb	Adverb
fasciculation	Yes	No	No	No
vellication	Yes	No	No	No

As nouns, vellication is a hypernym of fasciculation; that is, vellication is a word with a broader meaning than fasciculation:

fasciculation: muscular twitching of contiguous groups of muscle fibers
vellication: a sudden muscle spasm; especially one caused by a nervous condition

Other hypernyms of fasciculation include twitch, twitching.

fasciculation (noun)	vellication (noun)
muscular twitching of contiguous groups of muscle fibers	a sudden muscle spasm; especially one caused by a nervous condition