| pledge(verb, settle, agree, sign, engage) |
| promise(verb, settle, agree, sign, engage) |
| put in writing(verb, expression, idiom, settle, agree) |
| second |
| set(verb, settle, agree, sign, engage) |
| settle(verb, agree, sign, engage, commit) |
| shake hands on it(verb, expression, idiom, phrasal verb, settle) |
| sign for(verb, expression, phrasal verb, support, maintain) |
| sign papers(verb, expression, settle, agree, sign) |
| sign up(verb, expression, phrasal verb, settle, agree) |
| stipulate(verb, settle, agree, sign, engage) |
| testify(verb, vouch) |
| undertake(verb, settle, agree, sign, engage) |
| vouch for(verb, expression, support, appear, guarantee) |
| vow(verb, support, maintain, back, declare) |
| work out details(verb, expression, idiom, settle, agree) |
| accept |
| accredit |
| act as a witness(verb, expression, idiom, support, maintain) |
| affirm |