The term 'bell-shaped flower' refers to three different types of flowers: the sego (4 letters), LILY (4 letters), and tulip (5 letters). The sego is a type of wildflower native to the western United States, with white petals that form a bell shape. The LILY is a popular garden flower with large, colorful petals that also form a bell shape. The tulip is a bulbous flower with petals that flare outwards to form a bell shape. All three of these flowers are popular choices for gardens and bouquets.