A "fox-cub" is a term used to refer to the young of a fox. However, there are many other words that can be used to describe a fox-cub. Some synonyms for the term include "pup", "kit", "whelp", and "cubling". These words are often used interchangeably to describe the young of various animals. While the term "fox-cub" specifically refers to the offspring of a fox, the other terms can be used to describe the young of other animals such as wolves, bears, and the like. Regardless of the word used, all of these animals' young are adorable and captivating to watch.