S: (n) alarm clock, alarm (a clock that wakes a sleeper at some preset time)
Verb
S: (v) dismay, alarm, appal, appall, horrify (fill with apprehension or alarm; cause to be unpleasantly surprised) "I was horrified at the thought of being late for my interview"; "The news of the executions horrified us"
S: (v) alarm, alert (warn or arouse to a sense of danger or call to a state of preparedness) "The empty house alarmed him"; "We alerted the new neighbors to the high rate of burglaries"