| unconditioned(adjective, ideal, all time, the best) |
| uncontestable(adjective, ideal, all time, the best) |
| unquestioned(adjective, understandable) |
| apparent(adjective, clear, simple, plain, certain) |
| hard(adjective, clear, sound, plain, certain) |
| perspicuous(adjective, understandable) |
| authentic(adjective, certain, true, substantial, real) |
| convincing(adjective, clear, certain, definite, precise) |
| definitive |
| fixed(adjective, clear, certain, definite, unquestionable) |
| palpable(adjective, clear, plain, certain, true) |
| unimpeachable(adjective, certain, true, real, certainty) |
| unqualified(adjective, clear, certain, definite, unquestionable) |
| valid(clear, certain, true, definite, real) |
| assured(adjective, clear, simple, plain, certain) |
| comprehensible(adjective, understandable) |
| demonstrable(adjective, true, real) |
| doubtless(adjective, adverb, clear, certain, definite) |
| open-and-shut(adjective, pretty) |
| reliable(adjective, true, real, absolute, unequivocal) |