rubbish heap vs trash heap

rubbish heap and trash heap both are nouns.

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

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

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

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

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