| muddle-headed |
| naive(adjective, dull, simple, foolish, innocent) |
| nerdy(adjective, weak, simple, silly, foolish) |
| nescient(adjective, innocent, ignorant, unfamiliar, unconscious) |
| nitwit(adjective, foolish) |
| not all there(expression, idiom) |
| numskulled(adjective, dull, simple, slow, stupid) |
| oblivious(adjective, silly, foolish, innocent, senseless) |
| outrageous(adjective, impractical, half-baked, doomed) |
| poorly planned(expression, impulsive, impractical, half-baked, doomed) |
| puerile(adjective, dull, silly, absurd, impractical) |
| purposeless(adjective, silly, stupid, insignificant, senseless) |
| rash(adjective, dull, simple, slow, silly) |
| reckless(silly, thoughtless, unwise) |
| sappy(adjective, knowledge, slang, ability) |
| shallow(adjective, simple, slow, stupid, innocent) |
| sluggish(adjective, dull, simple, slow, stupid) |
| thick-headed(dull, silly, foolish, stupid, unintelligent) |
| trivial(adjective, dull, simple, slow, silly) |
| unaware(adjective, silly, foolish, innocent, senseless) |