mound vs scrapheap

mound and scrapheap both are nouns.

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

As nouns, scrapheap is a hyponym of mound; that is, scrapheap is a word with a more specific, narrower meaning than mound:

mound (noun)	scrapheap (noun)
the position on a baseball team of the player who throws the ball for a batter to try to hit	pile of discarded metal
structure consisting of an artificial heap or bank usually of earth or stones	an accumulation of refuse and discarded matter
(baseball) the slight elevation on which the pitcher stands
a collection of objects laid on top of each other
a small natural hill

mound (verb)	scrapheap (verb)
form into a rounded elevation