| confirmed(verb, established, substantiated, evinced, ascertained) |
| proven(verb, adjective, substantiated, evinced, ascertained) |
| verified(verb, substantiated, ascertained, experimented) |
| tested(verb, suitable, adequate, competent, capable) |
| demonstrated(verb, adjective, manifest, evinced, ascertained) |
| tried(verb, good, strong, solid, steady) |
| certain(adjective, good, strong, solid, true) |
| certified(verb, suitable, adequate, competent, capable) |
| determined(verb, good, strong, solid, steady) |
| substantiated(verb, evinced, ascertained) |
| validated(verb, established, substantiated, evinced) |
| valid(true, real, established, indisputable, approved) |
| attested(verb, evinced) |
| accepted |
| ascertained(verb, ascertained) |
| authenticated(verb, substantiated, evinced) |
| corroborated(verb, substantiated, evinced) |
| evidenced |
| shown(adjective, manifest) |
| assured(verb, ascertained) |