| decline(verb, break, drop, reduce, fail) |
| deteriorate(verb, drop, decline, reduce, destroy) |
| degenerate(verb, adjective, break, drop, decline) |
| exacerbate(verb, upset, light, disturb, diminish) |
| aggravate(verb, upset, decline, cause, disturb) |
| sink(verb, break, drop, decline, reduce) |
| get worse(verb, expression, idiom, decline, diminish) |
| retrogress(verb, decline, reduce, fail, diminish) |
| impair(verb, decline, reduce, destroy, fail) |
| weaken(verb, break, drop, decline, reduce) |
| fail(verb, break, drop, decline, fall) |
| heighten(verb, decline, annoy, provoke, aggravate) |
| disintegrate(verb, break, drop, decline, reduce) |
| exasperate(verb, upset, light, disturb, annoy) |
| go downhill(verb, expression, idiom, drop, decline) |
| decay(verb, break, drop, decline, reduce) |
| increase(verb, light, disturb, annoy, provoke) |
| intensify(verb, decline, disturb, annoy, provoke) |
| regress(verb, decline, reduce, fall, fail) |
| relapse(verb, drop, reduce, fall, fail) |