trash heap vs rubbish heap

trash heap and rubbish heap both are nouns.

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

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

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

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

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