go through vs polish off

go through and polish off both are verbs.

Word	Noun	Adjective	Verb	Adverb
go through	No	No	Yes	No
polish off	No	No	Yes	No

As verbs, polish off is a hypernym of go through; that is, polish off is a word with a broader meaning than go through:

Other hypernyms of go through include eat up, finish.

go through (verb)	polish off (verb)
eat up completely, as with great appetite	finish a task completely
apply thoroughly; think through	finish eating all the food on one's plate or on the table
undergo or live through a difficult experience	kill intentionally and with premeditation