flighty

[1]	escape , retreat , departure , exit , exodus , getaway , fleeing , bolting , (Slang) split
[2]	put to flight , chase/drive (off/away) , disperse , send off/away , send packing , dismiss , rout , stampede
[3]	take flight , flee , go/run away/off , abscond , desert , depart , (beat a) retreat , exit , bolt , decamp , withdraw , take to one's heels , show a clean pair of heels , (Colloq) light out , shove off , (Brit) scarper , (US) take a (run-out) powder , take it on the lam , lam out , (Slang) split , (Brit) do a bunk , do a moonlight flit , bugger off

adj.

[1]	fickle , flyaway , head-in-the-clouds , frivolous , inconstant , scatterbrained , capricious , fanciful , changeable , variable , mercurial , skittish , volatile , unstable , unsteady , giddy , wild
[2]	irresponsible , skittish , spooky , light-headed , rattle-brained , nervous , silly , hare-brained , dizzy , crazy , mad , reckless , thoughtless , (Colloq) nutty , screwy , dotty , dippy