trash pile vs garbage heap

trash pile and garbage heap both are nouns.

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

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

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

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

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