| flighty(noun, adjective, ability, careless, silly) |
| frivolous(noun, adjective, ability, careless, silly) |
| giddy(noun, adjective, ability, careless, silly) |
| silly(adjective, ability) |
| foolish(adjective, careless, silly, stupid, trivial) |
| dizzy(noun, adjective, slang, ability, careless) |
| empty-headed(adjective, ability) |
| irresponsible(adjective, careless, excited, stupid, vague) |
| rattlebrained |
| goofy(adjective, frivolous, dizzy, frothy, flighty) |
| hare-brained(noun, adjective, ignore, forget, vague) |
| capricious(adjective, careless, excited, immoral, thoughtless) |
| erratic(adjective, ignore, forget, vague, absent) |
| harebrained(adjective, ability, careless, silly, foolish) |
| rattlepated |
| inane |
| scatty(adjective, silly, vague, distracted, giddy) |
| fickle(adjective, careless, excited, immoral, thoughtless) |
| brainless(adjective, simple, slow, stupid, boring) |
| dull(adjective, silly, foolish, stupid, sluggish) |