2 Words to use with siren

Hear in the west the serpent's hiss Whose siren-fangs are set for this, To poison all your virtuous life.

Outside, at great speed and with sirens shrieking, automobiles were arriving, and I could hear the officers shouting: "Die Englischen kommen!" To make their reports they flung themselves up the steps, the electric torches, like bull's-eye lanterns, burning holes in the night.

2 Words to use with  siren