tic vs twitch

tic and twitch both are nouns.

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

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

Other hypernyms of tic include twitching, vellication.

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

tic (verb)	twitch (verb)
	make an uncontrolled, short, jerky motion
	squeeze tightly between the fingers
	move or pull with a sudden motion
	toss with a sharp movement so as to cause to turn over in the air
	move with abrupt, seemingly uncontrolled motions