tuck in vs tuck away

tuck in and tuck away both are verbs.

Word	Noun	Adjective	Verb	Adverb
tuck in	No	No	Yes	No
tuck away	No	No	Yes	No

As verbs, tuck in and tuck away are synonyms defined as:

tuck in and tuck away: eat up; usually refers to a considerable quantity of food

Other synonyms of tuck in include put away.

tuck in (verb)	tuck away (verb)
eat up; usually refers to a considerable quantity of food	eat up; usually refers to a considerable quantity of food