alarm
vb
1 daunt, dismay, distress, frighten, give (someone) a turn (informal) make (someone's) hair stand on end, panic, put the wind up (someone) (informal) scare, startle, terrify, unnerve
2 alert, arouse, signal, warn
n
3 anxiety, apprehension, consternation, dismay, distress, fear, fright, nervousness, panic, scare, terror, trepidation, unease, uneasiness
4 alarm-bell, alert, bell, danger signal, distress signal, hooter, siren, tocsin, warning
5 (archaic) call to arms, summons to arms
Antonyms
, vb
1 assure, calm, comfort, reassure, relieve, soothe
n
3 calm, calmness, composure, sang-froid, serenity