| indistinctness(noun, uncertainty, obscurity, vagueness, roughness) |
| irrationality |
| lack of confidence(noun, expression, idiom, trouble, concern) |
| misgiving(noun, trouble, concern, anxiety, confusion) |
| mistrust(noun, trouble, concern, anxiety, confusion) |
| mystification(noun, trouble, concern, anxiety, confusion) |
| obscurity(noun, doubt, uncertainty, vagueness, roughness) |
| oscillation(noun, trouble, concern, anxiety, confusion) |
| perplexity(noun, trouble, concern, anxiety, confusion) |
| polysemousness(noun, doubt, uncertainty, vagueness, haziness) |
| polysemy(noun, doubt, uncertainty, vagueness, haziness) |
| puzzle(noun, trouble, concern, anxiety, confusion) |
| puzzlement(noun, trouble, concern, anxiety, confusion) |
| qualm(noun, trouble, concern, anxiety, confusion) |
| quandary(noun, trouble, concern, anxiety, confusion) |
| query(noun, trouble, concern, anxiety, confusion) |
| questionableness(noun, trouble, concern, anxiety, confusion) |
| reserve(noun, trouble, concern, anxiety, confusion) |
| scruple(noun, trouble, concern, anxiety, confusion) |
| skepticism(noun, trouble, concern, anxiety, confusion) |