| incontrovertible(adjective, clear, hard, certain, true) |
| undeniable(adjective, clear, hard, certain, true) |
| incontestable(adjective, certain, true, sure, certainty) |
| unquestionable(adjective, correct, solid, exact, certain) |
| indisputable(adjective, certain, true, definite, precise) |
| certain(adjective, certain, true, definite, sure) |
| sure(adjective, clear, firm, solid, certain) |
| indubitable(adjective, clear, firm, solid, physical) |
| positive(adjective, clear, certain, true, definite) |
| absolute(adjective, clear, certain, definite, precise) |
| conclusive(adjective, clear, certain, definite, sure) |
| definite(adjective, clear, correct, firm, solid) |
| irrefragable(adjective, certain, definite, precise, sure) |
| undoubted(adjective, clear, flat, firm, solid) |
| clear(adjective, certain, definite, precise, sure) |
| decisive(adjective, clear, certain, definite, precise) |
| undisputed(adjective, accepted) |
| unequivocal(adjective, clear, certain, definite, sure) |
| judgemental |
| unanswerable(adjective, sound, reasonable, definite, precise) |