polish off vs tuck away

polish off and tuck away both are verbs.

Word	Noun	Adjective	Verb	Adverb
polish off	No	No	Yes	No
tuck away	No	No	Yes	No

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

Other hyponyms of polish off include put away, tuck in, consume, demolish, devour, down, go through.

polish off (verb)	tuck away (verb)
finish a task completely	eat up; usually refers to a considerable quantity of food
finish eating all the food on one's plate or on the table
kill intentionally and with premeditation