put in vs stack away

put in and stack away both are verbs.

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

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

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

put in (verb)	stack away (verb)
place, fit, or thrust (something) into another thing	keep or lay aside for future use
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