rubbish heap vs garbage heap

rubbish heap and garbage heap both are nouns.

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

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

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

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

rubbish heap (noun)	garbage heap (noun)
an accumulation of refuse and discarded matter	an accumulation of refuse and discarded matter