S1I1R1E1N1S1
6 points
SIRENS is validvalid
SIREN, a device that produces a penetrating warning sound [n]
SIREN, a device that produces a penetrating warning sound, also SYREN [n]
SIREN, a device that produces a penetrating warning sound [n]
SIREN, a device that produces a penetrating warning sound, also SYREN [n]