The term "quintette" refers to a group of five musicians or singers performing together. However, there are a few synonyms that can be used interchangeably with "quintettes." One such synonym is "quintet," which is the most commonly used term for this type of musical group. Another similar term is "pentad," which is derived from the Greek word for "five." "Quincunx" is another synonym for quintette, which refers to a group of five objects arranged in a square pattern with one in the center. "Pentet" is another synonym, which is a combination of "penta" meaning "five" and "et," which is Latin for "and." These synonyms can be used to add variety and nuance to your writing or speech.