Metro-nomes are devices used by musicians to keep time while playing music. These tools are very important as they help ensure that all musicians are playing together and in time with one another. However, there are several alternative ways to refer to metro-nomes. One term used is a "click-track," which is a digital device that produces a constant beat that helps musicians stay on time. Other synonyms for metro-nomes include "beat counters," "rhythm tools," and "timekeepers." Regardless of what terminology you use, it is clear that metro-nomes are an essential tool for any musician looking to play with precision and accuracy.