| reflux(noun, drop, decrease, retreat, ebb) |
| relapse(noun, verb, drop, decline, settle) |
| shorten(verb, reduce, diminish, decrease, contract) |
| slackening(noun, drop, act, increase, decrease) |
| slide(noun, verb, drop, decline, fall) |
| tail off(verb, expression, phrasal verb, drop, cut) |
| vanish(verb, stop, drop, close, go) |
| wear(verb, blow, decrease, consume, exhaust) |
| wind down(verb, expression, phrasal verb, close, decline) |
| withdraw(verb, go, leave, abandon, decrease) |
| worsen(verb, drop, decline, fall, fail) |
| back(drop, close, reduce, withdraw, diminish) |
| calm down(expression, drop, quiet, cut, decline) |
| corrode(verb, decline, blow, weaken, lessen) |
| de-escalate(verb, ease, diminish, decrease, lessen) |
| debasement |
| decadence |
| decadency |
| decline in power(expression, idiom) |
| degradation |