| heavy(adjective, dull, flat, silly, ordinary) |
| idiot(noun, person, fool, sap, yoyo) |
| ill-advised(adjective, dull, weak, simple, careless) |
| injudicious(adjective, weak, mind, rough, think) |
| irresponsible(adjective, careless, silly, foolish, vague) |
| lumpish(adjective, dull, simple, slow, heavy) |
| moron |
| nuts(adjective, wild, silly, foolish, crazy) |
| retarded |
| sappy(adjective, foolish, sentimental, imbecility folly) |
| soft(adjective, dull, silly, green, fat) |
| unimaginative(adjective, dull, flat, ordinary, dry) |
| arid(adjective, dull, flat, ordinary, dry) |
| besotted(dull, misjudgment) |
| blind(adjective, careless, foolish, thoughtless, unthinking) |
| crackpot |
| credulous(adjective, silly, green, fat, thick) |
| dunce(noun, adjective, fool, sap) |
| fat(adjective, silly, green, thick) |
| halfwitted |