kitchen midden vs rubbish dump

kitchen midden and rubbish dump both are nouns.

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

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

kitchen 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 kitchen midden include dump, dumpsite, garbage dump, trash dump, waste-yard, wasteyard.

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