rule, ruler
["dragonfly, darning needle, devil's darning needle, sewing needle, snake feeder, snake doctor, mosquito hawk, skeeter hawk", 'eel', 'harmonica, mouth organ, harp, mouth harp', 'puck, hockey puck', 'rubber eraser, rubber, pencil eraser', 'hognose snake, puff adder, sand viper', 'barometer']