Joseph's coat is a term often used to describe a colorful and vibrant garment. However, there are several synonyms for this term that can be used interchangeably. One such synonym is "rainbow coat," which highlights the various hues and colors that can be found in the garment. Another synonym is "coat of many colors," which directs attention to the complexity of the garment and the different fabrics it may be made from. "Multicolored coat" is another synonym that can be used to describe the same garment. Overall, these synonyms can be used to describe a striking and colorful piece of clothing that catches the eye and captures the imagination.