piles vs lots

piles and lots both are nouns.

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

As nouns, piles and lots are synonyms defined as:

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

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

piles (adverb)	lots (adverb)
	to a very great degree or extent