Found 2 items, similar to featherbrained.
English → English (WordNet) Definition: featherbrained featherbrained adj : lacking seriousness; given to frivolity; “a dizzy blonde”; “light-headed teenagers”; “silly giggles” [syn: airheaded, dizzy, empty-headed, giddy, light-headed, lightheaded, silly]
English → English (gcide) Definition: featherbrained featherbrained \feath"er*brained\, feather-brained \feath"er-brained\, a. Giddy; frivolous; lacking seriousness; given to frivolity; feather-headed. [Colloq.] Syn: airheaded, dizzy, empty-headed, giddy, lightheaded, light-headed, silly. [1913 Webster + WordNet 1.5]