still alarm
noun
a burglar alarm, fire alarm, or the like, that is activated silently and transmits a warning signal, usually by telephone.
Origin of still alarm
An Americanism dating back to 1870–75
Words nearby still alarm
stile,
stiletto,
stiletto heel,
stilicho,
still,
still alarm,
still and all,
still frame,
still hunt,
still layer,
still life