blepharism vs twitching

blepharism and twitching both are nouns.

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

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

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

Other hypernyms of blepharism include twitch, vellication.

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