woodpile vs cumulus

woodpile and cumulus both are nouns.

Word	Noun	Adjective	Verb	Adverb
woodpile	Yes	No	No	No
cumulus	Yes	Yes	No	No

As nouns, cumulus is a hypernym of woodpile; that is, cumulus is a word with a broader meaning than woodpile:

Other hypernyms of woodpile include agglomerate, cumulation, heap, mound, pile.

woodpile (noun)	cumulus (noun)
a pile or stack of wood to be used for fuel	a collection of objects laid on top of each other
	a globular cloud

woodpile (adjective)	cumulus (adjective)
	of or related to cumulous clouds