Term: torpedo: a small explosive device that is placed on a railroad track and fires when a train runs over it; the sound of the explosion warns the engineer of danger ahead
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: nomia melanderi: a common solitary bee important for pollinating alfalfa in the western United States
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: lennoaceae: family of fleshy parasitic herbs lacking green foliage and having heads of small flowers; California and Mexico
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: ecumenism: a movement promoting union between religions (especially between Christian churches)
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: manometer: a pressure gauge for comparing pressures of a gas
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: culture shock: a condition of disorientation affecting someone who is suddenly exposed to an unfamiliar culture or way of life or set of attitudes
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: valve: one of the paired hinged shells of certain molluscs and of brachiopods
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: grater: utensil with sharp perforations for shredding foods (as vegetables or cheese)
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: bathtub: a relatively large open container that you fill with water and use to wash the body
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: ornithorhynchidae: platypus
Broader: alarm: an automatic signal (usually a sound) warning of danger | Unrelated: plantlike flagellate: unicellular organisms having many characteristics of typical algae