junk pile vs trash heap

junk pile and trash heap both are nouns.

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

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

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

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

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