| charter(noun, agreement, contract, assurance, promise) |
| collateral(noun, agreement, contract, counter, assurance) |
| attestation(noun, agreement, contract, assurance, promise) |
| certification(noun, agreement, contract, assurance, promise) |
| deposit(noun, agreement, contract, assurance, promise) |
| gage(noun, agreement, contract, counter, assurance) |
| hostage(noun, confidence, counter, assurance, captive) |
| insurance(noun, agreement, contract, assurance, compact) |
| obligation(noun, pledge) |
| sponsor(noun, verb, law, support, person) |
| stand behind(verb, expression, phrasal verb, support, maintain) |
| attest(verb, support, maintain, secure, approve) |
| back(verb, support, maintain, secure, approve) |
| confirm(verb, support, maintain, secure, protect) |
| covenant(noun, agreement, contract, assurance, compact) |
| endorse(verb, support, maintain, secure, approve) |
| guarantor(noun, law, support, person, confidence) |
| insure(verb, support, maintain, secure, approve) |
| tie |
| agreement(noun, contract, assurance, compact, promise) |