tweak vs fine-tune

tweak is a noun but fine-tune is not a noun.

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

As verbs, tweak and fine-tune are synonyms defined as:

tweak (noun)	fine-tune (noun)
a squeeze with the fingers

tweak (verb)	fine-tune (verb)
adjust finely	adjust finely
to be under the influence of methamphetamine	improve or perfect by pruning or polishing
pull or pull out sharply	make fine adjustments or divide into marked intervals for optimal measuring
pinch or squeeze sharply