scrapheap vs junk pile

scrapheap and junk pile both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrapheap	Yes	No	No	No
junk pile	Yes	No	No	No

As nouns, scrapheap and junk pile are synonyms defined as:

Other synonyms of scrapheap include garbage heap, junk heap, refuse heap, rubbish heap, trash heap, trash pile.

scrapheap (noun)	junk pile (noun)
pile of discarded metal	an accumulation of refuse and discarded matter
an accumulation of refuse and discarded matter