lake dwelling vs dwelling house

lake dwelling and dwelling house both are nouns.

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

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

lake 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 lake dwelling include abode, domicile, dwelling, habitation, home.

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