| hesitation(noun, trouble, worry, concern, delay) |
| doubtfulness(noun, trouble, concern, anxiety, confusion) |
| challenge(verb, dispute, doubt, question, hesitate) |
| distrustfulness |
| query(noun, verb, trouble, oppose, concern) |
| anxiety(noun, trouble, worry, concern, strain) |
| fear(noun, verb, worry, concern, strain) |
| incredulity(noun, difficulty, anxiety, confusion, doubt) |
| jealousy(noun, doubt, uncertainty, impression, guess) |
| wonder(noun, verb, trouble, concern, dispute) |
| apprehend(verb, doubt, suspect) |
| beware(verb, doubt, suspect) |
| concern(noun, trouble, worry, anxiety, confusion) |
| diffidence(noun, difficulty, anxiety, confusion, doubt) |
| leeriness(noun, doubt, uncertainty, trust, dissent) |
| suspiciousness |
| apprehensiveness(noun, worry, strain, anxiety, burden) |
| be suspicious of(verb, expression, idiom, doubt, suspect) |
| cynicism(noun, doubt, uncertainty, impression, guess) |
| incertitude(noun, trouble, concern, difficulty, anxiety) |