scrapheap vs garbage heap

scrapheap and garbage heap both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrapheap	Yes	No	No	No
garbage heap	Yes	No	No	No

As nouns, scrapheap and garbage heap are synonyms defined as:

scrapheap and garbage heap: an accumulation of refuse and discarded matter

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

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