ALARUM
alarm, alert, warning signal, alarum
(noun) an automatic signal (usually a sound) warning of danger
Source: WordNet® 3.1
Etymology
Noun
alarum (plural alarums)
(archaic) A danger signal or warning.
A call to arms.
Verb
alarum (third-person singular simple present alarums, present participle alaruming, simple past and past participle alarumed)
(archaic) To sound alarums, to sound an alarm.
Usage notes
• Alarum is an old spelling of alarm (as a noun or a verb), which has stayed around as a deliberate archaism. Possibly it is retained because of its use in Shakespeare's plays.
Anagrams
• marula
Source: Wiktionary
A*lar"um, n. Etym: [OE. alarom, the same word as alarm, n.]
Definition: 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 Edition