Nervus glossopharyngeus is a cranial nerve that plays a crucial role in tongue and throat sensation, taste perception, and swallowing. However, there are several other words that can be used to refer to this nerve. One synonym is the ninth cranial nerve, as it is the ninth of twelve cranial nerves that emerge from the brain. Another term that can be used is the glossopharyngeal nerve, which is derived from the Latin words for "tongue" and "throat." Additionally, some medical professionals may simply refer to this nerve as the GPN. Regardless of what term is used, this nerve plays a vital role in overall oral health and should be properly cared for.