midden vs garbage dump

midden and garbage dump both are nouns.

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

As nouns, garbage dump is a hypernym of midden; that is, garbage 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
garbage dump: a piece of land where waste materials are dumped

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

midden (noun)	garbage 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