There are a few different words that can be used as synonyms for the word "cello". For example, a cello can also be referred to as a violoncello or simply a "cello". Additionally, some people may refer to the instrument as a "bass violin" or a "big viola". However, it is important to note that these terms are not always interchangeable, as they can refer to slightly different variations of the instrument or different styles of playing. Ultimately, the cello is a unique and beloved musical instrument with a rich history and vibrant community of players and enthusiasts.