roll up vs scratch

roll up is not a noun while scratch is a noun.

Word	Noun	Adjective	Verb	Adverb
roll up	No	No	Yes	No
scratch	Yes	No	Yes	No

As verbs, scratch is a hyponym of roll up; that is, scratch is a word with a more specific, narrower meaning than roll up:

Other hyponyms of roll up include run up, corral, collect, pull in, come up, scrape, scrape up, chunk, lump, bale, catch, fund, fund.

roll up (noun)	scratch (noun)
	an indication of damage
	(golf) a handicap of zero strokes
	poor handwriting
	a harsh noise made by scraping
	dry mash for poultry
	a line indicating the location of the start of a race or a game
	a competitor who has withdrawn from competition
	informal terms for money
	a depression scratched or carved into a surface
	an abraded area where the skin is torn or worn off

roll up (verb)	scratch (verb)
form a cylinder by rolling	cut the surface of; wear away the surface of
form into a cylinder by rolling	cause friction
show certain properties when being rolled	carve, cut, or etch into a material or surface
make into a bundle	gather (money or other resources) together over time
close (a car window) by causing it to move up, as with a handle	remove by erasing or crossing out or as if by drawing a line
arrive in a vehicle:	scrape or rub as if to relieve itching
get or gather together	postpone indefinitely or annul something that was scheduled