| deteriorate(verb, decline, weaken, degenerate, wane) |
| dip(verb, drop, slip, plunge, descend) |
| disarrange(verb, drop, slip, dip, plunge) |
| disarray(verb, drop, slip, dip, plunge) |
| disimprove(verb, decline, fail, lower, weaken) |
| disintegrate(verb, decline, fail, lower, collapse) |
| disorder(verb, drop, slip, dip, plunge) |
| disturb(verb, drop, slip, dip, plunge) |
| do a pratfall(verb, expression, idiom, upset, drop) |
| down(verb, drop, slip, dip, descend) |
| ebb(verb, decline, weaken, degenerate, deteriorate) |
| fade(verb, decline, weaken, degenerate, deteriorate) |
| fail(verb, decline, weaken, degenerate, deteriorate) |
| fall(verb, upset, collapse, plunge, tumble) |
| fall apart(verb, expression, decline, degenerate, degrade) |
| fall headlong(verb, expression, drop, slip, dip) |
| falter(verb, upset, fall, collapse, plunge) |
| flag(verb, decline, weaken, degenerate, deteriorate) |
| flatten(verb, drop, slip, dip, descend) |
| flip(verb, yield, collapse, explode) |