vacant land; unoccupied ground; empty lot
available room (hotel); vacancy; room to let
vacant house; unoccupied house
virtually empty; quite empty; inadequately defended; defenseless; defenceless
empty nest; empty house; empty home; burglary (of an empty house); burglar (who targets empty houses)
not busy; unengaged; being free; leisure
vacant or unoccupied room
empty residence; empty estate; empty lot
vacancy; room for rent or lease
open time slot; unoccupied time slot
vacant house; unoccupied house