| certain(adjective, true, definite, sure) |
| evident(certain, definite, demonstration, unquestionable) |
| incontestable(certain, definite, unquestionable, indisputable) |
| indubitable(certain, definite, sure, unquestionable) |
| accurate(adjective, good, sound, reasonable) |
| apodictic(certain, unquestionable, indisputable, unassailable) |
| beyond question(expression, certain, definite, unquestionable) |
| can bet on it(expression, certain, unquestionable, indisputable) |
| double-checked(certain, unquestionable, indisputable, unassailable) |
| inarguable(certain, definite, unquestionable, indisputable) |
| invincible(certain, unquestionable, indisputable, unassailable) |
| ironclad(certain, unquestionable, indisputable, unassailable) |
| irrebuttable(certain, unquestionable, indisputable, unassailable) |
| irresistible(certain, unquestionable, indisputable, unassailable) |
| nof ifs ands or buts(expression, certain, unquestionable, indisputable) |
| obvious(certain, definite, sure, unquestionable) |
| odds-on(certain, unquestionable, indisputable, unassailable) |
| positive(certain, definite, sure, unquestionable) |
| unanswerable(sound, reasonable, certain, rational) |
| unassailable(certain, definite, unquestionable, indisputable) |