| goofy(adjective, frivolous, dizzy, frothy, flighty) |
| cockamamie |
| silly(adjective, foolish, thoughtless, unwise, unintelligent) |
| wacky(adjective, silly, foolish, thoughtless, unwise) |
| foolish(adjective, silly, thoughtless, unintelligent, nonsensical) |
| sappy |
| whacky |
| zany(adjective, silly, foolish, thoughtless, unwise) |
| absurd(silly, foolish, thoughtless, unwise, unintelligent) |
| asinine(silly, foolish, thoughtless, unwise, unintelligent) |
| daft(silly, thoughtless, unwise) |
| dotty(silly, foolish, thoughtless, unwise, unintelligent) |
| idiotic(silly, foolish, thoughtless, unwise, unintelligent) |
| insane(silly, thoughtless, unwise) |
| irrational(silly, foolish, thoughtless, unwise, unintelligent) |
| loony(silly, foolish, thoughtless, unwise, unintelligent) |
| ludicrous(silly, foolish, thoughtless, unwise, unintelligent) |
| mad(silly, foolish, thoughtless, unwise, unintelligent) |
| nonsensical(silly, foolish, thoughtless, unwise, unintelligent) |
| nutty(silly, foolish, thoughtless, unwise, unintelligent) |