| empty-headed(adjective, silly, foolish, stupid, trivial) |
| gaga(adjective, insane, distraught, batty) |
| irresponsible(adjective, wrong, wild, strange, silly) |
| meaningless(adjective, dull, simple, slow, silly) |
| pointless(adjective, dull, simple, slow, silly) |
| unthinking(adjective, dull, simple, slow, silly) |
| addle-pated |
| blockheaded(adjective, foolish, impulsive, impractical, half-baked) |
| crackpot(adjective, foolish, impractical, half-baked, doomed) |
| demented(adjective, wild, silly, foolish, stupid) |
| doltish(adjective, dull, weak, simple, silly) |
| farcical(adjective, absurd) |
| fool |
| foolhardy(adjective, silly, foolish, stupid, crazy) |
| frivolous(adjective, silly, trivial, imbecility folly) |
| harebrained(adjective, weak, simple, knowledge, ability) |
| incongruous(adjective, silly, stupid, insignificant, unreasonable) |
| injudicious(adjective, weak, simple, mind, think) |
| retarded(adjective, impulsive, impractical, half-baked, doomed) |
| simpleminded(adjective, dull, simple, silly, foolish) |