| sure(adjective, set, strong, solid, certain) |
| trusty(strong, solid, steady, consistent, steadfast) |
| unanswerable(set, certain, unquestionable, indisputable, unassailable) |
| uncorrupt |
| undoubted |
| unequivocal(adjective, strong, solid, steady, absolute) |
| unspotted(good, clear, perfect, pure, innocent) |
| unsullied(good, clear, clean, honest, pure) |
| A-okay(perfect, precise, flawless, faultless, exquisite) |
| aces(perfect, precise, flawless, faultless, exquisite) |
| admitting no question(expression, idiom) |
| all right |
| allowable(adjective, decent, acceptable, adequate, sufficient) |
| angelical(adjective, respectable) |
| apodictic(set, certain, unquestionable, indisputable, unassailable) |
| apple-pie(perfect, precise, flawless, faultless, exquisite) |
| appropriate |
| authentic(true, real, absolute, indisputable, unmistakable) |
| average(adjective, good, reasonable, decent, generous) |
| axiomatic |