garbage heap vs refuse heap

garbage heap and refuse heap both are nouns.

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

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

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

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

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