A showy garden shrub is a type of plant that is often used to add color and texture to a garden. Two examples of showy garden shrubs are Azalea and SPIREA, both of which have six letters. Azaleas are flowering shrubs that come in a variety of colors and sizes, while Spireas are deciduous shrubs with small white or pink flowers. Both plants are popular choices for gardens due to their attractive blooms and easy maintenance.