| qualm(noun, trouble, feeling, worry, concern) |
| apprehension(noun, upset, trouble, feeling, worry) |
| fear(noun, upset, feeling, worry, concern) |
| suspicion(noun, trouble, feeling, worry, concern) |
| doubt(noun, upset, trouble, worry, concern) |
| mistrust(noun, trouble, worry, concern, delay) |
| anxiety(noun, upset, trouble, feeling, worry) |
| distrust(noun, trouble, concern, difficulty, anxiety) |
| hesitation(noun, trouble, worry, concern, delay) |
| uncertainty(noun, upset, trouble, worry, concern) |
| scruple(noun, upset, trouble, feeling, worry) |
| worry(noun, trouble, concern, strain, distress) |
| apprehensiveness(noun, feeling, worry, strain, sign) |
| uneasiness(noun, upset, trouble, worry, concern) |
| concern(noun, trouble, worry, distress, anxiety) |
| dread(noun, upset, trouble, feeling, worry) |
| scepticism(noun, doubt, unbelief doubt) |
| compunction(noun, upset, feeling, worry, concern) |
| foreboding(noun, trouble, feeling, worry, concern) |
| regret |