garbage heap vs trash pile

garbage heap and trash pile both are nouns.

Word	Noun	Adjective	Verb	Adverb
garbage heap	Yes	No	No	No
trash pile	Yes	No	No	No

As nouns, garbage heap and trash pile are synonyms defined as:

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

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

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