squirrel away vs stash

squirrel away is not a noun while stash is a noun.

Word	Noun	Adjective	Verb	Adverb
squirrel away	No	No	Yes	No
stash	Yes	No	Yes	No

As verbs, squirrel away and stash are synonyms defined as:

Other synonyms of squirrel away include cache, hive up, hoard, lay away.

squirrel away (noun)	stash (noun)
	a secret store of valuables or money

squirrel away (verb)	stash (verb)
save up as for future use	save up as for future use