stack away vs put in

stack away and put in both are verbs.

Word	Noun	Adjective	Verb	Adverb
stack away	No	No	Yes	No
put in	No	No	Yes	No

As verbs, stack away and put in are synonyms defined as:

Other synonyms of stack away include hive away, lay in, salt away, stash away, store.

stack away (verb)	put in (verb)
keep or lay aside for future use	place, fit, or thrust (something) into another thing
	break into a conversation
	to insert between other elements
	make an application as for a job or funding
	set up for use
	keep or lay aside for future use