There are many synonyms that can be used instead of "heavenly being." Some examples include angel, celestial, divine, ethereal, heavenly creature, holy being, spiritual being, and supernatural being. These terms all connote a sense of otherworldliness and often a higher form of existence than mere mortal beings. They are often associated with religious or spiritual beliefs and can refer to specific beings within those contexts, such as angels in Christianity or devas in Buddhism. Using different synonyms can add variety and depth to one's writing or conversation and allow for more nuanced descriptions of these mystical and mythical entities.