alarm synonyms:
noun
1 alert, signal, warning. alarm-clock, bell, fire-alarm, gong, siren, tocsin, whistle.
2 anxiety, apprehension, consternation, dismay, distress, fright, nervousness, panic, trepidation, uneasiness. D FEAR.
verb
agitate, daunt, dismay, dis tress, disturb, panic, inf put the wind up, scare, shock, startle, surprise, unnerve, upset, worry. D FRIGHTEN.
Opp REASSURE.