junk pile vs rubbish heap

junk pile and rubbish heap both are nouns.

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

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

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

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

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