| skittish(adjective, nervous) |
| wacky(adjective, weak, simple, knowledge, slang) |
| birdbrained(adjective, slang, ability, foolish, crazy) |
| brainless(adjective, weak, simple, careless, silly) |
| careless(adjective, wrong, wild, foolish, stupid) |
| daffy(adjective, weak, simple, silly, foolish) |
| daft(adjective, weak, simple, wild, silly) |
| fatuous(weak, simple, silly, foolish, stupid) |
| half-witted(weak, simple, silly, foolish, thoughtless) |
| imprudent(adjective, weak, simple, careless, wild) |
| inadvisable(adjective, recommended) |
| incautious(adjective, weak, simple, careless, wild) |
| inconsiderate(adjective, wild, silly, crazy, thoughtless) |
| irresponsible(adjective, careless, wild, strange, excited) |
| jerky(adjective, weak, simple, knowledge, slang) |
| lightheaded(excited, unreliable, changeable, fearful, fickle) |
| nonsensical(adjective, weak, simple, knowledge, ability) |
| senseless(weak, simple, silly, foolish, fantastic) |
| stupid(adjective, weak, simple, wild, silly) |
| zany(adjective, weak, simple, knowledge, ability) |