| jarring(adjective, rough, uneven, trembling, uncontrolled) |
| loony(adjective, light, knowledge, ability, informal) |
| lunatic(adjective, weak, simple, knowledge, ability) |
| mad(adjective, weak, simple, knowledge, ability) |
| nonsensical(adjective, weak, simple, knowledge, ability) |
| preposterous(adjective, weak, simple, knowledge, ability) |
| sappy(adjective, knowledge, slang, ability, silly) |
| shaking(adjective, agitated, trembling, uncontrolled, bumpy) |
| shaky(adjective, irregular, unreliable, uneven, variable) |
| sporadic(adjective, irregular, unreliable, uneven, variable) |
| tomfool(adjective, knowledge, ability, foolish) |
| twitchy(adjective, agitated, uncontrolled) |
| unsteady(rough, odd, unreliable, uneven, variable) |
| unsystematic(adjective, irregular, erratic, random, haphazard) |
| wacky(adjective, light, knowledge, slang, ability) |
| witless(adjective, weak, simple, silly, foolish) |
| wobbling(adjective, agitated) |
| zany(adjective, weak, simple, knowledge, ability) |
| balmy(adjective, knowledge, slang, ability) |
| brainless(adjective, weak, simple, silly, foolish) |