| incontestable(adjective, certain, true, ideal, all time) |
| indisputable(adjective, certain, true, ideal, all time) |
| undeniable(adjective, certain, true, ideal, all time) |
| unquestionable(adjective, certain, true, definite, ideal) |
| unequivocal(adjective, certain, definite, positive, ideal) |
| certain(adjective, certain, true, ideal, all time) |
| inarguable(adjective, certain, true, ideal, all time) |
| incontrovertible(adjective, certain, true, ideal, all time) |
| sure(adjective, certain, true, ideal, all time) |
| undisputed(adjective, ideal, accepted, all time, the best) |
| positive(adjective, plain, certain, true, absolute) |
| conclusive(adjective, certain, absolute, unquestionable, indisputable) |
| definite(adjective, plain, certain, unquestionable, unambiguous) |
| guaranteed(adjective, certain, unquestionable) |
| indubitable(adjective, plain, certain, true, absolute) |
| infallible(adjective, certain, unquestionable) |
| irrefutable(adjective, certain, true) |
| absolute(adjective, certain) |
| clear(adjective, plain, certain, absolute, indisputable) |
| firm(adjective, certain, unquestionable) |