tweak vs twitch

tweak and twitch both are nouns.

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

As verbs, twitch is a hypernym of tweak; that is, twitch is a word with a broader meaning than tweak:

Other hypernyms of tweak include nip, pinch, squeeze, tweet, twinge.

tweak (noun)	twitch (noun)
a squeeze with the fingers	a sudden muscle spasm; especially one caused by a nervous condition

tweak (verb)	twitch (verb)
adjust finely	make an uncontrolled, short, jerky motion
to be under the influence of methamphetamine	squeeze tightly between the fingers
pull or pull out sharply	move or pull with a sudden motion
pinch or squeeze sharply	toss with a sharp movement so as to cause to turn over in the air
	move with abrupt, seemingly uncontrolled motions