junk pile vs trash pile

junk pile and trash pile both are nouns.

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

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

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

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

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