prettify vs polish

prettify is not a noun while polish is a noun.

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

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

prettify (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

prettify (verb)	polish (verb)
make more beautiful	bring to a highly developed, finished, or refined state
	improve or perfect by pruning or polishing
	make (a surface) shine