A piano quartet is a classical music ensemble that consists of a piano and three other instruments, typically a violin, viola, and cello. If you're looking for synonyms to describe this musical arrangement, you could use the term "chamber music quartet" or "keyboard quartet." Other terms that might apply would be "keyboard trio with strings" or "classical quartet with piano." The piano quartet is a flexible ensemble that allows for a wide range of musical styles and arrangements, from classical chamber music to more modern compositions that incorporate elements of jazz and other genres. Regardless of the specific terminology used to describe it, the piano quartet remains a vital and beloved format for musicians and listeners alike.