| improbable(adjective, hard, extraordinary, uncertain, fantastic) |
| unlikely(adjective, hard, strange, uncertain, fantastic) |
| implausible(adjective, hard, extraordinary, fantastic, amazing) |
| incredible(adjective, hard, great, extraordinary, strange) |
| unbelievable(adjective, hard, great, extraordinary, strange) |
| doubtful(adjective, hard, extraordinary, uncertain, fantastic) |
| preposterous(adjective, hard, great, extraordinary, strange) |
| dubious(adjective, hard, uncertain, doubtful, unclear) |
| fantastic(adjective, hard, strange, true, marvelous) |
| fishy(adjective, hard, uncertain, doubtful, suspicious) |
| questionable(adjective, uncertain, doubtful, absurd, unclear) |
| unrealistic(adjective, hard) |
| absurd(adjective, wrong, strange, foolish, stupid) |
| bizarre(adjective, hard, wild, strange, true) |
| exaggerated |
| extravagant(adjective, strange, crazy, fantastic, insane) |
| obscure(uncertain, fantastic, shaky, unclear, unlikely) |
| recondite(adjective, hard, fantastic) |
| strange(adjective, hard, experience, marvelous, distant) |
| suspicious(adjective, hard, uncertain, fantastic, doubtful) |