| lamebrained(extraordinary, amazing, dubious, astonishing, incredible) |
| open to doubt(expression, idiom, extraordinary, amazing, dubious) |
| outlandish(extraordinary, amazing, incredible) |
| phony(extraordinary, amazing, incredible) |
| preposterous(extraordinary, amazing, incredible) |
| questionable(extraordinary, amazing, incredible) |
| reaching(extraordinary, amazing, dubious, astonishing, incredible) |
| scatterbrained(extraordinary, amazing, dubious, astonishing, incredible) |
| screwy(extraordinary, amazing, dubious, astonishing, incredible) |
| staggering(extraordinary, amazing, incredible) |
| suspect(extraordinary, amazing, incredible) |
| thick(extraordinary, amazing, dubious, astonishing, incredible) |
| thin(extraordinary, amazing, incredible) |
| too much(expression, extraordinary, amazing, dubious, astonishing) |
| unbelievable(adjective, extraordinary, amazing, incredible) |
| unconvincing(extraordinary, amazing, incredible) |
| unimaginable(extraordinary, amazing, incredible) |
| unsubstantial(extraordinary, amazing, incredible) |
| unthinkable(extraordinary, amazing, incredible) |
| weak(extraordinary, amazing, incredible) |