| guarantee(verb, settle, agree, declare, approve) |
| assure(verb, support, maintain, secure, settle) |
| secure(verb, support, maintain, secure, agree) |
| warrant(noun, verb, support, maintain, secure) |
| promise(verb, support, give, maintain, secure) |
| confirm(verb, support, maintain, secure, settle) |
| insure(verb, support, maintain, secure, agree) |
| make certain(verb, expression, idiom, support, check) |
| make sure(verb, expression, idiom, support, check) |
| safeguard(verb, maintain, secure, confirm, uphold) |
| pledge(verb, support, maintain, secure, agree) |
| certify(verb, support, maintain, secure, approve) |
| warranty |
| guaranty(noun, verb, support, maintain, secure) |
| clinch(verb, secure, settle, confirm, certainty) |
| protect(verb, support, maintain, secure, confirm) |
| ascertain(verb, check) |
| see to it(verb, expression, idiom, phrasal verb, see) |
| establish(verb, secure, settle, confirm, guarantee) |
| guard(verb, maintain, secure, see, note) |