polish vs fine-tune

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

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

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

Other synonyms of polish include down, refine.

polish (noun)	fine-tune (noun)
the property of being smooth and shiny
a highly developed state of perfection; having a flawless or impeccable quality
a preparation used in polishing

polish (verb)	fine-tune (verb)
bring to a highly developed, finished, or refined state	adjust finely
improve or perfect by pruning or polishing	improve or perfect by pruning or polishing
make (a surface) shine	make fine adjustments or divide into marked intervals for optimal measuring