Conkers is a term commonly used to describe the game of playing with horse chestnuts. However, there are various synonyms for conkers which may be used, depending on where you are in the world. Some of these synonyms include "hazelnuts," "buckeyes," "chestnuts," and "cobnuts." In North America, "buckeyes" are more commonly used to describe these nuts which are polished, strung on strings and used for the game of conkers. The various synonyms used in different parts of the world is a good example of how language can vary greatly, especially when it comes to regional terms.