feath·er·brain 
(fĕthər-brān′)
(fĕthər-brān′)n.
A silly, flighty, or empty-headed person.
feather·brained′ adj.
- cover glass
- cover ground
- covering
- covering letter
- coverless
- coverlet
- cover letter
- coverlid
- cover (one's) ass
- cover one's ass
- cover (one's) tracks
- cover one's tracks
- coverpoint
- covers
- coversine
- cover slip
- coverslip
- cover story
- covert
- cover (the) ground
- cover the ground
- cover the waterfront
- covertly
- covertness
- cover tracks