blepharism vs vellication

blepharism and vellication both are nouns.

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

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

blepharism: condition in which a person blinks continuously
vellication: a sudden muscle spasm; especially one caused by a nervous condition

Other hypernyms of blepharism include twitch, twitching.

blepharism (noun)	vellication (noun)
condition in which a person blinks continuously	a sudden muscle spasm; especially one caused by a nervous condition