The term 'Rhododendron Relatives' refers to a group of flowering plants that are closely related to the Rhododendron genus. This group includes Azaleas, which is a seven-letter word that can be found in the crossword solution. Azaleas are deciduous or evergreen shrubs that are native to many parts of the world and are known for their colorful blooms. They are popular ornamental plants and are often used in landscaping.