a perch upon which birds or fowls rest at night.

a large cage, house, or place for fowls or birds to roost in.

a place for sitting, resting, or lodging.

to sit or rest on a roost, perch, etc.

to settle or stay, esp. for the night. ?

come home to roost

(of an action) to revert or react unfavorably to the doer; boomerang

an evil deed that came home to roost and ruined his life.

rule the roost

to be in charge or control; dominate

It was only too apparent that his grandfather ruled the roost.

noun

abode , alight , land , lodging , nest , perch , settle , sit , sleep