| kooky(weak, simple, silly, foolish, unreasonable) |
| loony(weak, simple, silly, foolish, unreasonable) |
| lunatic(weak, simple, silly, foolish, thoughtless) |
| madcap(adjective, foolish, thoughtless, risky, imprudent) |
| maladroit(adjective, inappropriate) |
| misled(adjective, foolish, unreasonable, mistaken, ill-advised) |
| neglectful(adjective, inappropriate, imprudent, misguided, injudicious) |
| negligent(adjective, careless, thoughtless, inconsiderate, imprudent) |
| out of place(expression, idiom) |
| reasonless(foolish, unreasonable, illogical) |
| screwball(silly, foolish) |
| selfish(adjective, careless, thoughtless, unconscious, inconsiderate) |
| simple(adjective, weak, silly, foolish, stupid) |
| small |
| spiritless |
| tomfool(adjective, foolish) |
| trivial(adjective, silly, stupid, insignificant, ridiculous) |
| unadvisable(careless, foolish, thoughtless, rash, irresponsible) |
| unbefitting |
| uncivil |