Kam-tai is a word that typically translates to a Chinese language family. However, there are several synonyms that can be used to describe this particular language family. One of the most common synonyms is the "Tai-Kadai" language family, which is primarily spoken in Southeast Asia. Another synonym that can be used is the "Tai-Kradai" language family, which is also spoken in southeast Asia and parts of China. Other synonymous terms for Kam-tai include "Daic," which is used to refer to the indigenous ethnic groups of southern China, and "Kradai," which is a term that is popularly used in linguistic circles to refer to the language family. Regardless of which synonym is chosen, they all describe the same language family with their specific regional and cultural nuances.