Alarum
Part of speech: noun
Definition: A danger signal or warning. A call to arms.
Part of speech: verb
Definition: To sound alarums, to sound an alarm.
Alert
Part of speech: adjective
Definition: Attentive; awake; on-guard.
Part of speech: noun
Definition: An alarm.A notification.
Part of speech: verb
Definition: To give warning to.
Example sentence: To find a new word that is accurate and different, you have to be alert for it.