The Oxford Thesaurus An A-Z Dictionary of Synonyms - alarm n.

1) warning, alert, danger- or distress-signal; tocsin, bell, gong, siren, whistle, horn: At the approach of the storm, the lookouts gave the alarm. The alarm is set to wake me at four o'clock. 2) fear, fright, apprehension, dismay, trepidation, terror, dread, anxiety, excitement, panic, consternation, distress, nervousness, uneasiness, discomfort: He viewed with alarm the arrest of his next-door neighbours. --v. 3) frighten, scare, daunt, startle, terrify, panic; unnerve, dismay, disturb, upset: She was alarmed at the news of the car crash. Don't be alarmed - such delays are quite normal.