burke vs polish off

burke and polish off both are verbs.

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

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

Other hypernyms of burke include bump off, dispatch, hit, murder, off, remove, slay.

burke (verb)	polish off (verb)
get rid of, silence, or suppress	finish a task completely
murder without leaving a trace on the body	finish eating all the food on one's plate or on the table
	kill intentionally and with premeditation