| caution(noun, verb, sign, notice, alert) |
| unnerve(verb, upset, bother, disturb, worry) |
| daunt(verb, upset, bother, disturb, worry) |
| disquiet(noun, verb, upset, trouble, bother) |
| distress(noun, verb, upset, trouble, feeling) |
| notice(noun, caution, warning, caveat) |
| petrify(verb, shock, agitate, fear, scare) |
| signal(noun, verb, sign, notice, alert) |
| siren(noun, alert, device, signal, warning) |
| caveat(noun, sign, notice, alert, caution) |
| terrorize(verb, upset, bother, disturb, worry) |
| tocsin(noun, sign, device, signal, warning) |
| appal(verb, adjective, upset, shock, horrify) |
| awe(noun, verb, upset, worry, distress) |
| disturb(verb, upset, trouble, bother, worry) |
| nervousness(noun, upset, feeling, worry, concern) |
| uneasiness(noun, upset, feeling, worry, concern) |
| upset(noun, verb, trouble, bother, disturb) |
| affright(noun, verb, upset, bother, disturb) |
| cowardice(noun, distress, anxiety, fear, dismay) |