rat·tle·brained 
(rătl-brānd′)
(rătl-brānd′)adj.
Giddy and talkative; foolish.
rattle·brain′ (-brān′) n.
- autobahn
- autobiographer
- autobiographic
- autobiographical
- autobiographically
- autobiography
- autobus
- autocatalysis
- autocatalytic
- autocatalytically
- autocatalytic plating
- autocephalous
- autocephaly
- autochthon
- autochthonal
- autochthonic
- autochthonism
- autochthonous
- autochthonously
- autochthony
- autoclave
- autocoid
- autocoid
- autocomplete
- autocracy