scads vs piles

scads and piles both are nouns.

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

As nouns, scads and piles are synonyms defined as:

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

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