polish vs overrefine

polish is a noun but overrefine is not a noun.

Word	Noun	Adjective	Verb	Adverb
polish	Yes	No	Yes	No
overrefine	No	No	Yes	No

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

Other hyponyms of polish include over-refine, civilise, civilize, cultivate, educate, school, train.

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