| demonstrable(adjective, certain) |
| destined(adjective, certain) |
| double-checked(set, certain, unquestionable, indisputable, unassailable) |
| establishable(adjective, certain, undeniable, cincher, unequivocable) |
| fixed(adjective, certain) |
| guaranteed(adjective, certain) |
| having down pat(expression, adjective, idiom, certain, undeniable) |
| incontestible |
| infallible(adjective, certain) |
| invincible(set, certain, unquestionable, indisputable, unassailable) |
| ironclad(set, certain, unquestionable, indisputable, unassailable) |
| irrebuttable(set, certain, unquestionable, indisputable, unassailable) |
| irresistible(set, certain, unquestionable, indisputable, unassailable) |
| known(adjective, certain) |
| nof ifs ands or buts(expression, set, certain, unquestionable, indisputable) |
| obvious(set, certain, definite, unquestionable, indisputable) |
| odds-on(set, certain, unquestionable, indisputable, unassailable) |
| on ice(expression, adjective, certain, undeniable, cincher) |
| proven(set, certain, definite, unquestionable, indisputable) |
| reliable(adjective, certain) |