The term "French Telephone" is not used very often in modern times, and there are actually several synonyms that are more commonly used. One is "can phone," which comes from the old-fashioned practice of using two cans connected by a string to communicate. Another is "tin can phone." Another term that is sometimes used is "acoustic phone," which refers to phones that have no electrical components and rely solely on sound waves to transmit sound. In some contexts, people might also use the term "toy phone" to refer to a child's toy that resembles a telephone. Lastly, some people might simply refer to a French Telephone as an outdated or old-fashioned telephone.