tune vs tweak

tune and tweak both are nouns.

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

As verbs, tweak is a hyponym of tune; that is, tweak is a word with a more specific, narrower meaning than tune:

Other hyponyms of tune include fine-tune, service, tune in.

tune (noun)	tweak (noun)
the adjustment of a radio receiver or other circuit to a required frequency	a squeeze with the fingers
the property of producing accurately a note of a given pitch
a succession of notes forming a distinctive sequence

tune (verb)	tweak (verb)
adjust the pitches of (musical instruments)	adjust finely
adjust for (better) functioning	to be under the influence of methamphetamine
	pull or pull out sharply
	pinch or squeeze sharply