| degenerate(verb, drop, strong, decline, increase) |
| depreciate(verb, drop, decline, fall, fail) |
| discolor(verb, decline, weaken, lessen, degenerate) |
| dissolve(verb, decline, weaken, lessen, degenerate) |
| dry-rot(verb, decline, weaken, lessen, degenerate) |
| dwindle(verb, drop, decline, fall, fail) |
| get worse(verb, expression, decline, weaken, lessen) |
| go bad(verb, expression, decline, weaken, lessen) |
| go to seed(verb, expression, idiom, decline, fail) |
| go to the dogs(verb, expression, idiom, drop, decline) |
| hit rock bottom(verb, expression, idiom, decline, weaken) |
| lessen(verb, drop, decline, fall, fail) |
| mildew(verb, decline, weaken, lessen, degenerate) |
| mold(verb, decline, weaken, lessen, degenerate) |
| molder(verb, decline, weaken, lessen, degenerate) |
| mortify(verb, decline, weaken, lessen, degenerate) |
| pejorate(verb, decline, weaken, lessen, degenerate) |
| perish(verb, decline, weaken, lessen, degenerate) |
| pollute(verb, decline, weaken, lessen, degenerate) |
| putrefy(verb, decline, weaken, lessen, degenerate) |