| alternation |
| atrophy(verb, deteriorate) |
| backing |
| be precipitated(verb, drop, decline, settle, ease) |
| become less(verb, expression, drop, fall, fail) |
| block |
| bout(noun, spell) |
| break down(verb, expression, phrasal verb, drop, decline) |
| break up(verb, expression, decline, reduce, fail) |
| breakdown(noun, disorder, disease, collapse, disturbance) |
| buckle(verb, drop, decline, settle, ease) |
| bug(disorder, disease, collapse, disturbance, sickness) |
| call off(verb, expression, move, change, push) |
| capsize(verb, move, change, push, return) |
| cascade(verb, drop, decline, settle, ease) |
| cave in(verb, expression, drop, decline, settle) |
| change(verb, move, push, return, twist) |
| change position(verb, expression, move, change, push) |
| cheapen(verb, drop, fall, fail, diminish) |
| cock |