(n.) A snug or confined place.

alcove asylum bay bolt-hole cache carrel concealment corner cove cover covert coverture cranny cubby cubicle dark corner den doghouse dugout foxhole funk hole hideaway hideout hidey hole hiding hiding place hole lair mousehole niche nook oriel pigeonhole pinch playhouse recess refuge retreat roomlet sanctuary secret place snuggery stash tight spot tight squeeze undercovert