'air built' definitions:
- aerial,
- airy,
- chimeric,
- chimerical,
- cloud-born,
- cloud-built,
- cloud-woven,
- dreamlike,
- ethereal,
- fanciful,
- fatuitous,
- fatuous,
- gaseous,
- gossamery,
- illusory,
- imaginary,
- phantasmal,
- phantomlike,
- rarefied,
- shadowy,
- spirituous,
- subtile,
- subtle,
- tenuous,
- unreal,
- vaporous,
- vapory,
- windy