scrapheap vs rubbish heap

scrapheap and rubbish heap both are nouns.

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

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

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

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

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