WordRel.com

• a device that signals the occurrence of some undesirable event

  synonym	alarm systemwarning device
  hypernym	device
  hyponym	automobile hornburglar alarmcar hornfire alarmhooterhornhornmotor hornsirensmoke alarm

• a clock that wakes a sleeper at some preset time

  synonym	alarm clock
  hypernym	clock

• an automatic signal (usually a sound) warning of danger

  synonym	alarumalertwarning signal
  hypernym	signsignalsignalingsignalling
  hyponym	air alertalarm bellburglar alarmfire alarmfoghornfogsignalhornred flagsirentocsintorpedo

• fear resulting from the awareness of danger

  synonym	consternationdismay
  attribute	alarmingunalarming
  hypernym	fearfearfulnessfright

• warn or arouse to a sense of danger or call to a state of preparedness

  synonym	alert
  hypernym	warn
  hyponym	wake

• fill with apprehension or alarm; cause to be unpleasantly surprised

  synonym	appalappalldismayhorrify
  derivation	alarmist
  hypernym	affrightfrightfrightenscare
  hyponym	shock