heaps vs piles

heaps and piles both are nouns.

Word	Noun	Adjective	Verb	Adverb
heaps	Yes	No	No	Yes
piles	Yes	No	No	No

As nouns, heaps and piles are synonyms defined as:

Other synonyms of heaps include dozens, gobs, lashings, loads, lots, oodles, rafts, scads, scores, slews, stacks, tons, wads.

heaps (noun)	piles (noun)
a large number or amount	a large number or amount
	venous swelling external or internal to the anal sphincter

heaps (adverb)	piles (adverb)
very much