tic vs vellication

tic and vellication both are nouns.

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

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

tic: a local and habitual twitching especially in the face
vellication: a sudden muscle spasm; especially one caused by a nervous condition

Other hypernyms of tic include twitch, twitching.

tic (noun)	vellication (noun)
a local and habitual twitching especially in the face	a sudden muscle spasm; especially one caused by a nervous condition