Aria da capo is a musical term often used in operas and cantatas. It means to repeat the first section of an aria at the end, creating a full circle structure. However, there are a few synonyms for this term that also capture the essence of repetition. One such synonym is "da capo al fine," which means to repeat to the end. Another similar term is "da capo al segno," which means to repeat to a specific sign in the score. Additionally, the term "ritornello" can refer to a repeated instrumental section within an aria. All of these terms convey the concept of revisiting and repeating musical material within a piece.