store vs stack away

store is a noun but stack away is not a noun.

Word	Noun	Adjective	Verb	Adverb
store	Yes	No	Yes	No
stack away	No	No	Yes	No

As verbs, store and stack away are synonyms defined as:

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

store (noun)	stack away (noun)
a mercantile establishment for the retail sale of goods or services
a depository for goods
an electronic memory device
a supply of something available for future use

store (verb)	stack away (verb)
keep or lay aside for future use	keep or lay aside for future use
find a place for and put away for storage