pile dwelling vs dwelling house

pile dwelling and dwelling house both are nouns.

Word	Noun	Adjective	Verb	Adverb
pile dwelling	Yes	No	No	No
dwelling house	Yes	No	No	No

As nouns, dwelling house is a hypernym of pile dwelling; that is, dwelling house is a word with a broader meaning than pile dwelling:

pile dwelling: dwelling built on piles in or near a lake; specifically in prehistoric villages
dwelling house: housing that someone is living in

Other hypernyms of pile dwelling include abode, domicile, dwelling, habitation, home.

pile dwelling (noun)	dwelling house (noun)
dwelling built on piles in or near a lake; specifically in prehistoric villages	housing that someone is living in