pile up vs scrape up

pile up and scrape up both are verbs.

Word	Noun	Adjective	Verb	Adverb
pile up	No	No	Yes	No
scrape up	No	No	Yes	No

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

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

pile up (verb)	scrape up (verb)
increase in amount by collecting or gathering	gather (money or other resources) together over time
arrange into piles or stacks
get or gather together