Perirhinal is a scientific term that refers to a specific anatomical structure in the brain. However, if you need to find synonyms for this word, you can consider using alternatives such as parahippocampal, entorhinal, or rhinal cortices. These words are commonly used in neuroscience to describe different parts of the brain that are involved in memory, navigation, and spatial cognition. While perirhinal cortex is a unique part of the brain, it is often discussed in conjunction with other regions nearby, which is why there are several synonyms you can use to describe it.