Aery

Adjective:

1. Characterized by lightness and insubstantiality; as impalpable or intangible as air

Noun:

1. The lofty nest of a bird of prey (such as a hawk or eagle)
2. Any habitation at a high altitude

Synonyms:

1. Aerial
2. Aerie
3. Aeriform
4. Airy
5. Ethereal
6. Etherial
7. Eyry