| affirm(verb, assert, undertake, promise, pledge) |
| assert(verb, undertake, affirm, promise, pledge) |
| attest(verb, assert, undertake, affirm, promise) |
| avow(verb, assert, undertake, affirm, promise) |
| covenant(verb, assert, undertake, affirm, promise) |
| depend on(verb, expression, phrasal verb, assert, trust) |
| depone(verb, testify) |
| depose(verb, assert, undertake, affirm, promise) |
| give witness(verb, expression, assert, trust, undertake) |
| have confidence in(verb, expression, idiom, phrasal verb, assert) |
| maintain(verb, assert, undertake, affirm, promise) |
| make an affidavit(verb, expression, idiom, assert, trust) |
| pledge oneself(verb, expression, assert, trust, undertake) |
| plight(verb, assert, undertake, affirm, promise) |
| promise(verb, assert, trust, undertake, affirm) |
| rely on(verb, expression, phrasal verb, assert, trust) |
| say so(verb, expression, assert, trust, undertake) |
| state(verb, assert, undertake, affirm, promise) |
| swear(verb, declare, undertake, promise, pledge) |
| swear to God(verb, expression, idiom, assert, trust) |