| fatuous(adjective, weak, simple, wild, silly) |
| fruity(adjective, slang, silly, foolish, mad) |
| haywire(adjective, crazy, broken) |
| moronic(adjective, weak, simple, knowledge, ability) |
| oddball(noun, adjective, characteristic, person, unusual) |
| round the bend(expression, adjective, idiom, silly, foolish) |
| sappy(adjective, knowledge, slang, ability, strange) |
| wild(adjective, wrong, strange, silly, foolish) |
| asinine(adjective, weak, simple, silly, foolish) |
| cockamamie(adjective, weak, simple, wrong, silly) |
| deranged(adjective, wild, silly, foolish, stupid) |
| erratic(adjective, unusual, wild, strange, silly) |
| irrational(adjective, weak, simple, informal, unusual) |
| loco(noun, adjective, slang, sane) |
| witless(adjective, informal, foolish, crazy, mad) |
| bananas(adjective, slang, sane) |
| brainless(weak, simple, silly, foolish, unreasonable) |
| cockamamy(adjective, silly, foolish, thoughtless, unwise) |
| cranky(adjective, characteristic, person, behavior) |
| gaga(adjective, keen, warm, informal, passionate) |