Alarum
Pronunciation : A*lar"um
Part of Speech : n.
Etymology : [OE. alarom, the same word as alarm, n.]
Definition : Defn: See Alarm. [Now Poetic]
Note: The variant form alarum is now commonly restricted to an alarm signal or the mechanism to sound an alarm (as in an alarm clock.)
Source : Webster's Unabridged Dictionary, 1913