| be in vain(verb, decline, fall, fail, slip) |
| be ruined(verb, decline, fall, fail, slip) |
| be unsuccessful(verb, decline, fall, fail, slip) |
| blunder(verb, decline, fall, fail, slip) |
| break down(verb, expression, drop, decline, settle) |
| come to naught(verb, expression, idiom, decline, fall) |
| come to nothing(verb, expression, idiom, decline, fall) |
| deprave(verb, reduce, lessen, lapse, deteriorate) |
| drop(noun, verb, decline, fall, fail) |
| ebb(verb, drop, decline, settle, fall) |
| elapse(verb, decline, fall, terminate, degenerate) |
| fall flat(verb, expression, decline, fall, fail) |
| fall short(verb, expression, decline, fall, fail) |
| fall through(verb, expression, decline, fall, fail) |
| fizzle(verb, decline, fall, fail, slip) |
| flop(verb, drop, decline, settle, fall) |
| flounder(verb, decline, fall, fail, slip) |
| fold(verb, decline, fall, fail, slip) |
| founder(verb, decline, fall, fail, slip) |
| go backwards(verb, expression, phrasal verb) |