natural shelter
- caveUnderground hollow in rock
- denPrivate room or lair
- burrowAnimal's dug dwelling
- hollowEmpty within
- overhangSection projecting beyond support
canopy · thicket · refuge · haven · nest · lair · grove · hideaway · rock · shade · cover · bramble · undergrowth · ledge · crevice · windbreak · driftwood · roots
origin/construction
natural shelterbuilding
Enclosed roofed structure
manufactured housing · architecture · bunker · tent · house