| attest(verb, support, state, maintain, back) |
| certify(verb, support, state, give, maintain) |
| guarantee(noun, verb, support, state, give) |
| swear(verb, state, maintain, declare, tell) |
| assure(verb, support, state, give, back) |
| witness(verb, support, state, give, maintain) |
| testify(verb, state, give, maintain, declare) |
| confirm(verb, state, give, maintain, agree) |
| affirm(verb, support, state, give, maintain) |
| avouch(verb, state, maintain, agree, allow) |
| corroborate(verb, support, state, give, back) |
| declare(verb, state, give, maintain, agree) |
| substantiate(verb, support, give, back, sign) |
| warrant(verb, support, give, back, declare) |
| state(verb, maintain, agree, allow, declare) |
| support(verb, give, maintain, back, sign) |
| vow(verb, support, give, pass, declare) |
| verify(verb, support, state, give, back) |
| asseverate(verb, state, give, maintain, agree) |
| aver(verb, state, maintain, agree, allow) |