Beverly Sills was a renowned American opera singer, and there are several words that can be used to describe her. One such synonym is the term soprano, which refers to her vocal range - Sills was known for her ability to hit high notes with ease. Other synonyms include diva, opera star, and vocalist. These terms all suggest the level of success and recognition Sills achieved in her career, as well as the impact she had on the world of opera. Overall, Beverly Sills is remembered as a talented and influential singer, and there are many words that can be used to capture her legacy.