| silly(adjective, light, foolish, stupid, crazy) |
| crazy(adjective, light, informal, silly, foolish) |
| wacky(adjective, light, informal, silly, stupid) |
| foolish(adjective, silly, foolish, stupid, fantastic) |
| half-assed |
| nutty(noun, adjective, light, silly, stupid) |
| idiotic(adjective, silly, foolish, stupid, fantastic) |
| zany(adjective, silly, foolish, crazy, funny) |
| dopey(adjective, silly, foolish, stupid, frivolous) |
| ditzy(adjective, silly, frivolous, dizzy, frothy) |
| sappy(adjective, frivolous, dizzy, frothy, flighty) |
| dumb(adjective, silly, foolish, stupid, impractical) |
| dotty(noun, adjective, informal, silly, foolish) |
| kooky(adjective, silly, foolish, unwise, frivolous) |
| daffy(noun, adjective, silly, frivolous, dizzy) |
| flaky(adjective, light, informal, silly, crazy) |
| cockamamie(adjective, frivolous, dizzy, frothy, flighty) |
| whacky(adjective, frivolous, dizzy, frothy, flighty) |
| stupid(adjective, strange, silly, foolish, senseless) |
| screwy(adjective, light, silly, stupid, crazy) |