polish off vs tuck in

polish off and tuck in both are verbs.

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

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

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

polish off (verb)	tuck in (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