YHI is a term that refers to the Aboriginal sun goddess in Australian mythology. Although there is no exact synonym for YHI as it is a name, some possible related words that might be used when talking about her or related topics include "sun", "radiance", "divinity", and "enlightenment". Other possible synonyms might include words related to the themes of life, creation, and light. Regardless of the specific word used, it is clear that the figure of YHI has played an important role in Aboriginal culture and continues to inspire people today with her mythic power and symbolic significance.