scrapheap vs cumulation

scrapheap and cumulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrapheap	Yes	No	No	No
cumulation	Yes	No	No	No

As nouns, cumulation is a hypernym of scrapheap; that is, cumulation is a word with a broader meaning than scrapheap:

Other hypernyms of scrapheap include agglomerate, cumulus, heap, mound, pile.

scrapheap (noun)	cumulation (noun)
pile of discarded metal	a collection of objects laid on top of each other
an accumulation of refuse and discarded matter