| deflection(noun, inclination, grade, sharpness, slant) |
| depression(noun, drop, decline, fall, position) |
| destruction(noun, drop, decrease, reduction, tumble) |
| devexity |
| deviation(noun, inclination, pitch, grade, sharpness) |
| diagonal(noun, adjective, inclination, grade, sharpness) |
| dive(noun, drop, decline, fall, decrease) |
| downslide(noun, drop, cut, decline, fall) |
| downswing(noun, drop, cut, decline, fall) |
| downtrend(noun, drop, cut, decline, fall) |
| downturn(noun, drop, cut, decline, fall) |
| downward slope(noun, expression, drop, cut, decline) |
| droop(drop, fall, plunge, slide, dive) |
| dwindling(noun, drop, cut, decline, fall) |
| ebb(noun, drop, cut, decline, fall) |
| evenfall |
| extraction |
| falling(drop, fall, plunge, slide, dive) |
| falling off(noun, expression, drop, cut, decline) |
| filiation |