| relapse(verb, weaken, lapse, degenerate, deteriorate) |
| backslide(verb, lapse, degenerate, deteriorate, relapse) |
| fall back(verb, expression, fall, fail, degenerate) |
| lapse(verb, fall, fail, degenerate, deteriorate) |
| recidivate(verb, fall, fail, weaken, degenerate) |
| regress(verb, fall, fail, weaken, lapse) |
| retrogress(verb, fall, fail, degenerate, deteriorate) |
| revert(verb, lapse, degenerate, deteriorate, relapse) |
| degenerate(deteriorate, revert) |
| deteriorate(degenerate, revert) |
| fall(fail, weaken, degenerate, deteriorate, revert) |
| return |
| sicken(fall, fail, weaken, degenerate, deteriorate) |
| slide back(expression, fall, fail, weaken, degenerate) |
| worsen(fall, fail, weaken, degenerate, deteriorate) |
| be overcome(fall, fail, weaken, degenerate, deteriorate) |
| be overtaken(fall, fail, weaken, degenerate, deteriorate) |
| cock |
| disimprove |
| fade(fall, fail, weaken, degenerate, deteriorate) |