nest
noun
1 in May and June, the females build a nest and incubate their eggs:
roost, eyrie;
nest box, nesting box;
North American birdhouse.
2 usually the animals will awake and disperse rapidly from the nest if disturbed:
lair, den, drey, lodge, burrow, set, form.
3 a cosy little love nest:
hideaway, hiding place, hideout, retreat, shelter, refuge, snuggery, nook, den, haunt;
informal hidey-hole.
nest Oxford Dictionary of English