Try Crannog - see wikipedia for full explanation
Their ordinary dwelling is the wikiup, or small rounded hut, of tule rushes over a framework of poles, with the ground for a floor and the fire in the center,
Hogan
subterranean
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A dwelling is a another name for a home
Home.
A small house or dwelling
A small, squalid, unpleasant, or simply constructed dwelling.
I think so...ground dwelling mammal...small...
A cottage, bungalow, shack or hut.
Riverine
adobe
Troll
The likely word is "bungalow" (a small house or attached dwelling).
powerhouse
Harem