The term 'EAGLE's Roost' is a term used to describe the nest of an EAGLE. It is also known as an AERY or AERIE, which are both four and five letter words respectively. An AERY is a large nest built by a bird of prey, such as an EAGLE, hawk, or falcon, usually on a cliff or in a tree. An AERIE is a large nest built by a bird of prey, usually on a cliff or in a tree, but can also refer to a dwelling or lookout built on a high place.