fine-tune vs calibrate

fine-tune and calibrate both are verbs.

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

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

fine-tune and calibrate: make fine adjustments or divide into marked intervals for optimal measuring

Other synonyms of fine-tune include graduate.

fine-tune (verb)	calibrate (verb)
adjust finely	make fine adjustments or divide into marked intervals for optimal measuring
improve or perfect by pruning or polishing	measure the caliber of
make fine adjustments or divide into marked intervals for optimal measuring	mark (the scale of a measuring instrument) so that it can be read in the desired units