rubbish heap vs scrapheap

rubbish heap and scrapheap both are nouns.

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

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

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

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

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