over-refine vs polish

over-refine is not a noun while polish is a noun.

Word	Noun	Adjective	Verb	Adverb
over-refine	No	No	Yes	No
polish	Yes	No	Yes	No

As verbs, polish is a hypernym of over-refine; that is, polish is a word with a broader meaning than over-refine:

Other hypernyms of over-refine include down, fine-tune, refine.

over-refine (noun)	polish (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

over-refine (verb)	polish (verb)
refine too much or with excess of subtlety	bring to a highly developed, finished, or refined state
	improve or perfect by pruning or polishing
	make (a surface) shine