| assurance(promise, pledge, vow) |
| binder(promise, pledge, vow) |
| charge(promise, pledge, vow, engagement) |
| commitment(promise, pledge, vow) |
| committal(need, promise, pledge, vow, engagement) |
| devoir(need, promise, pledge, vow, engagement) |
| duty(promise, pledge, vow) |
| engagement(need, promise, pledge, vow) |
| guarantee(need, promise, pledge, vow, engagement) |
| liability(need, promise, pledge, vow, engagement) |
| must(need, promise, pledge, vow, engagement) |
| need(promise, pledge, vow, engagement) |
| obligation(promise, pledge, vow) |
| ought(need, promise, pledge, vow, engagement) |
| pledge(need, promise, vow, engagement) |
| promise(need, pledge, vow, engagement) |
| responsibility(promise, pledge, vow) |
| undertaking(need, promise, pledge, vow, engagement) |
| vow(need, promise, pledge, engagement) |
| warrant(promise, pledge, vow) |