| conclusive(adjective, clear, strong, reasonable, easy) |
| earnest(adjective, sensible, true, steady, resolute) |
| exact(adjective, good, close, open, correct) |
| fiducial |
| guaranteed |
| harmless(adjective, clear, sound, gentle, pure) |
| honourable |
| indisputable(adjective, true, real, absolute, unequivocal) |
| persistent(adjective, strong, tough, honest, certain) |
| plausible(open, sound, reasonable, honest, sensible) |
| precise(adjective, good, close, open, correct) |
| punctilious(adjective, exact, careful, regular, honorable) |
| punctual(adjective, characteristic, time, quality, speed) |
| regular(adjective, firm, solid, exact, stable) |
| sturdy(adjective, calm, strong, secure, tough) |
| tenable(sound, reasonable, rational, realistic, authentic) |
| tested(adjective, flawless, infallible, proven, time-tested) |
| thorough(adjective, careful, resolute, meticulous, conscientious) |
| true-blue(adjective, close, open, correct, honest) |
| unbending(adjective, resolute, persistent, dedicated, unwavering) |