polish off vs bump off

polish off and bump off both are verbs.

Word	Noun	Adjective	Verb	Adverb
polish off	No	No	Yes	No
bump off	No	No	Yes	No

As verbs, polish off and bump off are synonyms defined as:

Other synonyms of polish off include dispatch, hit, murder, off, remove, slay.

polish off (verb)	bump off (verb)
finish a task completely	kill intentionally and with premeditation
finish eating all the food on one's plate or on the table
kill intentionally and with premeditation