| threat(noun, information, sign, anxiety, notice) |
| timidity(noun, distress, anxiety, fear, dismay) |
| tip off(noun, verb, expression, phrasal verb, device) |
| tumult(noun, excitement, anxiety, agitation, nervousness) |
| unsettle(verb, upset, trouble, bother, disturb) |
| warning device(noun, expression, idiom) |
| angst(noun, upset, worry, concern, distress) |
| astound(verb, upset, bother, worry, provoke) |
| buoy |
| danger signal(noun, expression, idiom, alert, warning) |
| discomposure(noun, charge, worry, excitement, strain) |
| disquietude(noun, upset, worry, concern, strain) |
| faintheartedness(noun, distress, anxiety, fear, dismay) |
| ferment(noun, verb, trouble, disturb, worry) |
| flare |
| flurry(noun, verb, trouble, bother, disturb) |
| flutter(noun, worry, excitement, strain, anxiety) |
| high sign(noun, expression, sign, device, warning) |
| intimidation(noun, fear, horror) |
| lesson(information, sign, notice, alert, caution) |