"Tengo una bomba."
Well, if you were a journalist, you could say: "Tengo una bomba informativa" (I've an informative bomb), which is frequently used here in Spain, even between people of the street who are not journalists ;)
Son tres bombas en este coche. Bomba one is the water pump. Bomba two is the gas pump. Bomba three is wired to the ignition and will take out an entire city block. Bomba = pump or bomb depending on context.