| provisionary(adjective, unsettled, indefinite, temporary, tentative) |
| provisory |
| refutable(adjective, vague, imaginary, theoretical, supposed) |
| set aside(expression, adjective, void, meaningless, invalid) |
| shady(uncertain, doubtful, shaky, dubious, unlikely) |
| sneaky(shaky, unlikely, unpromising) |
| sterile(adjective, meaningless, invalid, unsubstantiated, unsupported) |
| stochastic(adjective, vague, imaginary, theoretical, supposed) |
| subject to change |
| supposed |
| suspect(uncertain, doubtful, shaky, vague, dubious) |
| tentative(adjective, doubtful, unsettled, vague, hesitant) |
| test(adjective, unsettled, temporary, tentative, speculative) |
| theoretical |
| touch-and-go(shaky, unlikely, unpromising) |
| touch and go(expression, idiom, doubtful, vague, unsure) |
| touchy(shaky, unlikely, unpromising) |
| trial(adjective, unsettled, indefinite, temporary, tentative) |
| unapt(adjective, doubtful) |
| unattested |