tweak vs nip

tweak and nip both are nouns.

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

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

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

tweak (noun)	nip (noun)
a squeeze with the fingers	a small sharp bite or snip
	a tart spicy quality
	the property of being moderately cold
	the taste experience when a savoury condiment is taken into the mouth
	a small drink of liquor

tweak (verb)	nip (verb)
adjust finely	squeeze tightly between the fingers
to be under the influence of methamphetamine	sever or remove by pinching or snipping
pull or pull out sharply	give a small sharp bite to
pinch or squeeze sharply