A cochlear implant is a device that allows deaf people to hear sounds by directly stimulating the auditory nerve. However, there are some other synonyms that could be useful when referring to this type of device. For example, one could also use the phrase "hearing implant" or "auditory implant" to describe the device. Another possibility is "inner ear prosthesis," which highlights the fact that the implant is designed to replace a part of the ear that is not functioning properly. Finally, some people may use the term "bionic ear," which is a more colloquial way of describing the implant that highlights its technological nature.