midden vs rubbish dump

midden and rubbish dump both are nouns.

Word	Noun	Adjective	Verb	Adverb
midden	Yes	No	No	No
rubbish dump	Yes	No	No	No

As nouns, rubbish dump is a hypernym of midden; that is, rubbish dump is a word with a broader meaning than midden:

midden: (archeology) a mound of domestic refuse containing shells and animal bones marking the site of a prehistoric settlement
rubbish dump: a piece of land where waste materials are dumped

Other hypernyms of midden include dump, dumpsite, garbage dump, trash dump, waste-yard, wasteyard.

midden (noun)	rubbish dump (noun)
a heap of dung or refuse	a piece of land where waste materials are dumped
(archeology) a mound of domestic refuse containing shells and animal bones marking the site of a prehistoric settlement