run up vs pile up

run up and pile up both are verbs.

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

As verbs, pile up is a hypernym of run up; that is, pile up is a word with a broader meaning than run up:

Other hypernyms of run up include accumulate, amass, collect, compile, hoard, roll up.

run up (verb)	pile up (verb)
pile up (debts or scores)	increase in amount by collecting or gathering
raise by using ropes and pulleys	arrange into piles or stacks
fasten by sewing; do needlework	get or gather together
make by sewing together quickly
accumulate, sometimes as a debt