roll up vs stack away

roll up and stack away both are verbs.

Word	Noun	Adjective	Verb	Adverb
roll up	No	No	Yes	No
stack away	No	No	Yes	No

As verbs, stack away is a hypernym of roll up; that is, stack away is a word with a broader meaning than roll up:

Other hypernyms of roll up include hive away, lay in, put in, salt away, stash away, store.

roll up (verb)	stack away (verb)
form a cylinder by rolling	keep or lay aside for future use
form into a cylinder by rolling
show certain properties when being rolled
make into a bundle
close (a car window) by causing it to move up, as with a handle
arrive in a vehicle:
get or gather together