| whistle(noun, alert, device, warning, bell) |
| amaze(verb, upset, bother, provoke, excite) |
| care(noun, worry, concern, anxiety, interest) |
| cold feet(noun, expression, feeling, excitement, slang) |
| discomfort(noun, verb, upset, worry, anxiety) |
| disorder(noun, verb, trouble, bother, disturb) |
| forewarn(verb, caution, warning, warn, notify) |
| jitters(noun, excitement, distress, anxiety, agitation) |
| ruffle(noun, verb, upset, trouble, bother) |
| surprise(verb, upset, shock, agitate, affect) |
| warning signal(noun, expression, idiom) |
| admonition(noun, information, sign, notice, alert) |
| alarm clock(noun, expression, idiom, clock) |
| apprehensiveness(noun, worry, strain, anxiety, burden) |
| astonish(verb, upset, shock, affect, throw) |
| beacon(noun, light, guide) |
| chill(verb, upset, bother, disturb, worry) |
| clock(noun, device, warning, bell, instantaneity) |
| discomfit(verb, upset, bother, disturb, shock) |
| discourage(verb, upset, bother, disturb, worry) |