stacks vs dozens

stacks and dozens both are nouns.

Word	Noun	Adjective	Verb	Adverb
stacks	Yes	No	No	No
dozens	Yes	No	No	No

As nouns, stacks and dozens are synonyms defined as:

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

stacks (noun)	dozens (noun)
storage space in a library consisting of an extensive arrangement of bookshelves where most of the books are stored	a large number or amount
a large number or amount