| flat(adjective, dull, weak, plain, mild) |
| flavorless(adjective, dull, weak, plain, mild) |
| gross(adjective, nasty, awful, vile, vulgar) |
| half-baked(weak, simple, silly, foolish, thoughtless) |
| half-witted(weak, simple, silly, foolish, thoughtless) |
| harebrained(weak, simple, silly, foolish, thoughtless) |
| ho hum(expression, adjective, dull, weak, plain) |
| humdrum(adjective, dull, weak, plain, mild) |
| idiotic(weak, simple, silly, foolish, thoughtless) |
| ill-advised(weak, simple, silly, foolish, thoughtless) |
| ill-considered(weak, simple, silly, foolish, thoughtless) |
| imprudent(weak, simple, silly, foolish, thoughtless) |
| incautious(weak, simple, silly, foolish, thoughtless) |
| indiscreet(weak, simple, silly, foolish, thoughtless) |
| injudicious(weak, simple, silly, foolish, thoughtless) |
| insane(weak, simple, silly, foolish, thoughtless) |
| insipid(adjective, dull, weak, plain, mild) |
| irrational(weak, simple, silly, foolish, thoughtless) |
| jejune |
| jerky(weak, simple, silly, foolish, thoughtless) |