| extravagant(adjective, imbecility folly) |
| facetious(adjective, ridiculous, pitiful, pathetic, humorous) |
| farcical(adjective, ridiculous, pitiful, pathetic, humorous) |
| fat(adjective, silly, stupid, green, thick) |
| flaky(adjective, simple, silly, foolish, stupid) |
| foolhardy(adjective, foolish, crazy, insane) |
| forgetful(adjective, silly, foolish, senseless, unnecessary) |
| gormless |
| gross |
| halfwitted |
| harebrained(weak, simple, careless, silly, foolish) |
| hollow |
| ill-advised(weak, simple, silly, foolish, stupid) |
| injudicious(weak, simple, silly, foolish, thoughtless) |
| insignificant(adjective, silly, stupid, ridiculous, absurd) |
| jackass(adjective, foolish) |
| jejune |
| jerky(weak, simple, silly, foolish, thoughtless) |
| jocose(adjective, ridiculous, pitiful, pathetic, humorous) |
| jocular(adjective, ridiculous, pitiful, pathetic, humorous) |