| apocryphal |
| avoided(adjective, meaningless, invalid, unsubstantiated, unsupported) |
| bad(adjective, meaningless, invalid, unsubstantiated, unsupported) |
| borderline(shaky, unlikely, unpromising) |
| chancy(doubtful, shaky, vague, unsure, unlikely) |
| clouded(shaky, unlikely, unpromising) |
| conditional |
| conjecturable(adjective, vague, imaginary, theoretical, supposed) |
| conjectural(doubtful, unsettled, vague, questionable, assumed) |
| contestable(adjective, vague, imaginary, theoretical, supposed) |
| contingent(uncertain, doubtful, unsettled, vague, dubious) |
| dead(adjective, meaningless, invalid, unsubstantiated, unsupported) |
| dicey(shaky, unlikely, unpromising) |
| disreputable(shaky, unlikely, unpromising) |
| doubtable(doubtful, shaky, risky, unlikely, unpromising) |
| dubitable(uncertain, doubtful, shaky, dubious, unlikely) |
| exploratory(adjective, unsettled, tentative, speculative, provisional) |
| far-fetched(shaky, unlikely, unpromising) |
| fat chance(expression, shaky, unlikely, unpromising) |
| fishy(uncertain, doubtful, shaky, dubious, unlikely) |