twitching vs vellication

twitching and vellication both are nouns.

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

As nouns, twitching and vellication are synonyms defined as:

twitching and vellication: a sudden muscle spasm; especially one caused by a nervous condition

Other synonyms of twitching include twitch.

twitching (noun)	vellication (noun)
a sudden muscle spasm; especially one caused by a nervous condition	a sudden muscle spasm; especially one caused by a nervous condition