| avouch(verb, state, maintain, declare, approve) |
| avow(verb, support, state, maintain, back) |
| back up(verb, expression, phrasal verb, support, maintain) |
| book |
| certificate(noun, verb, agreement, permit, recognize) |
| clinch(verb, state, maintain, secure, settle) |
| corroborate(verb, support, state, maintain, back) |
| cover(noun, verb, protect, bond, protection) |
| endorsement(noun, permit, security, warrant, seal) |
| engagement(noun, agreement, arrangement, need, contract) |
| finance(verb, support, help, set, promote) |
| guarantor |
| maintain(verb, support, state, favor, back) |
| ratify(verb, support, state, maintain, praise) |
| sanction(noun, verb, support, state, secure) |
| stand up for(verb, expression, idiom, phrasal verb, support) |
| substantiate(verb, support, maintain, back, declare) |
| troth(noun, pass, catch, assurance, commit) |
| uphold(verb, support, maintain, favor, back) |
| answer(noun, wave, greeting, nod, salutation) |