| dim(adjective, dull, weak, boring, dead) |
| dime a dozen(expression, adjective, idiom, dull, boring) |
| dismal(adjective, dull, flat, stupid, ordinary) |
| down-to-earth(adjective, tough, rational, straightforward, sober) |
| draggy(adjective, dull, weak, boring, dead) |
| driveling(adjective, dull, flat, stupid, ordinary) |
| earthy(adjective, tough, rational, straightforward, sober) |
| emotionless(adjective, tough, rational, straightforward, sober) |
| enervated |
| factual(adjective, simple, tough, clean, plain) |
| familiar(adjective, flat, stupid, ordinary, dry) |
| fatiguing |
| feasible(adjective, tough, rational, straightforward, sober) |
| flavorless(adjective, dull, weak, dead, tedious) |
| frank |
| frigid |
| hackneyed(adjective, mean, simple, flat, poor) |
| hard-boiled(adjective, tough, rational, straightforward, sober) |
| heavy(adjective, flat, stupid, ordinary, dry) |
| hoary(adjective, flat, stupid, ordinary, dry) |