| improbable(adjective, slight, extraordinary, strange, superb) |
| implausible(adjective, slight, extraordinary, strange, superb) |
| doubtful(adjective, slight, uncertain, shaky, dubious) |
| remote(adjective, slight, doubtful, dubious, improbable) |
| incredible(adjective, extraordinary, strange, superb, fantastic) |
| dubious(adjective, open, slight, uncertain, doubtful) |
| unbelievable(adjective, obscure, extraordinary, strange, superb) |
| far-fetched(adjective, hard, strange, uncertain, fantastic) |
| questionable(adjective, open, uncertain, doubtful, shaky) |
| unthinkable(adjective, light, thin, extraordinary, unusual) |
| fishy(adjective, uncertain, doubtful, shaky, dubious) |
| inconceivable(adjective, light, obscure, thin, belief) |
| outside(adjective, slight, remote, slim) |
| fantastic(adjective, extraordinary, strange, superb, amazing) |
| farfetched(adjective, unbelievable, improbable, unbelieveable) |
| absurd(adjective, strange, crazy, unreasonable, fantastic) |
| slight(adjective, doubtful, remote, dubious, improbable) |
| unconvincing(adjective, extraordinary, strange, fantastic, doubtful) |
| preposterous(adjective, obscure, strange, exceptional, crazy) |
| unfit(adjective, appropriate, inappropriate, unsuitable, unsuited) |