| convinced(clear, certain, definite, positive, confident) |
| convincing(clear, certain, definite, positive, confident) |
| doubtless(clear, certain, definite, sure, positive) |
| for a fact(expression, idiom, clear, certain, definite) |
| genuine(clear, certain, definite, positive, confident) |
| incontestable(clear, certain, definite, positive, confident) |
| incontrovertible(clear, certain, definite, positive, confident) |
| indisputable(clear, certain, definite, positive, confident) |
| indubitable(clear, certain, definite, positive, confident) |
| never-failing(clear, certain, definite, sure, positive) |
| persuaded(clear, certain, definite, positive, confident) |
| real(clear, certain, definite, positive, confident) |
| satisfied(clear, certain, definite, positive, confident) |
| sure(adjective, certain, definite, unquestionable, undisputable) |
| telling(clear, certain, definite, positive, confident) |
| uncompromising(clear, certain, definite, positive, confident) |
| undeniable(clear, certain, definite, positive, confident) |
| unequivocal(clear, certain, definite, positive, confident) |
| valid(clear, certain, definite, positive, confident) |
| abiding(clear, certain, definite, unquestionable, undisputable) |