stockpile vs cumulus

stockpile and cumulus both are nouns.

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

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

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

stockpile (noun)	cumulus (noun)
a storage pile accumulated for future use	a collection of objects laid on top of each other
something kept back or saved for future use or a special purpose	a globular cloud

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

stockpile (verb)	cumulus (verb)
have on hand