| milk-and-water(adjective, dull, weak, plain, mild) |
| modest(plain, indifferent, ordinary, boring, mediocre) |
| moth-eaten(adjective, dull, flat, stupid, dead) |
| nerdy(adjective, dull, weak, plain, mild) |
| neutral |
| no great shakes(adjective, indifferent, ordinary, modest, mediocre) |
| nothing special(adjective, indifferent, ordinary, modest, mediocre) |
| nothing to write home about(expression, idiom, indifferent, ordinary, modest) |
| nowhere(adjective, dull, flat, stupid, boring) |
| oily |
| pabulum(adjective, dull, weak, plain, mild) |
| plebeian(adjective, dull, flat, stupid, dead) |
| prolix(adjective, dry, boring, tedious, monotonous) |
| quiet(adjective, dull, flat, slow, heavy) |
| repetitive(adjective, dull, dry, boring, tedious) |
| sapless(adjective, dull, weak, plain, mild) |
| sedative |
| simple |
| sluggish |
| spiritless(adjective, dull, weak, stupid, boring) |