| sluggish(adjective, dull, simple, slow, silly) |
| concrete(adjective, set, hard, tough, solid) |
| exuberant |
| half-witted(adjective, dull, simple, slow, silly) |
| imbecilic(adjective, dull, simple, slow, silly) |
| lumpish(adjective, dull, heavy, stupid, vulgar) |
| moronic(adjective, dull, simple, slow, silly) |
| teeming(fancy, full, rich, green, assemblage) |
| thickset(adjective, person, body, full, thick) |
| backward(adjective, dull, simple, slow, silly) |
| deep(adjective, set, solid, dark, heavy) |
| dull-witted |
| flourishing |
| foolish(adjective, dull, simple, slow, silly) |
| impassive(adjective, dull, slow, stupid, unresponsive) |
| jammed(adjective, full, thick, busy, teeming) |
| leaden(adjective, heavy, gloomy, gray, overcast) |
| ponderous(adjective, dull, big, heavy, substantial) |
| rank(adjective, fancy, big, rich, green) |
| rigid(adjective, set, strong, hard, tough) |