| Answer | Crossword Clue |
|---|---|
| syren | a siren (a device that produces a piercing warning sound) |
| syrens | SYREN, a siren (a device that produces a piercing warning sound) |
| sirens | SIREN, a device that produces a piercing warning sound |
| siren | a device that produces a piercing warning sound |
| siren | device often electrically operated for producing a penetrating warning sound an ambulance siren an air-raid siren |
| pyrostat | safety device that, when a fire breaks out in its vicinity, automatically causes a mechanism to sound a warning alarm |
