"Cold shiver" is a phrase that refers to the feeling of chills that run down one's spine. There are several other synonyms that can be used to describe this sensation. Some of the commonly used terms include shudder, tremble, quiver, shake, and quaver. Each of these words conveys a similar feeling of discomfort or fear that is often associated with cold shivers. Other synonyms that can be used to describe this sensation include frisson, goosebumps, and horripilation. These words are often used in literature to create a sense of suspense or uncertainty, and they are also frequently used in everyday conversation to describe a feeling of unease or discomfort.