fund vs pile up

fund is a noun but pile up is not a noun.

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

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

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

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

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

fund (noun)	pile up (noun)
a financial institution that sells shares to individuals and invests in securities issued by other companies
a reserve of money set aside for some purpose
a supply of something available for future use

fund (verb)	pile up (verb)
furnish money for	increase in amount by collecting or gathering
place or store up in a fund for accumulation	arrange into piles or stacks
convert (short-term floating debt) into long-term debt that bears fixed interest and is represented by bonds	get or gather together
accumulate a fund for the discharge of a recurrent liability
invest money in government securities
provide a fund for the redemption of principal or payment of interest