roll up vs change form

roll up and change form both are verbs.

Word	Noun	Adjective	Verb	Adverb
roll up	No	No	Yes	No
change form	No	No	Yes	No

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

Other hypernyms of roll up include change shape, deform.

roll up (verb)	change form (verb)
form a cylinder by rolling	assume a different shape or form
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