refuse heap vs junk heap

refuse heap and junk heap both are nouns.

Word	Noun	Adjective	Verb	Adverb
refuse heap	Yes	No	No	No
junk heap	Yes	No	No	No

As nouns, refuse heap and junk heap are synonyms defined as:

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

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

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