Law merchant is a term that refers to a set of commercial laws and practices that were developed during the medieval period. The term is often used interchangeably with the term "lex mercatoria," which is the Latin equivalent. However, there are other synonyms for the term that are commonly used in different contexts. Some of these synonyms include "customary law," "trade law," "commercial law," and "maritime law." These terms reflect the different aspects of the law merchant and the specific areas of commerce to which these laws apply. Regardless of the synonym used, the law merchant remains an important historical concept that has influenced commercial law and international trade up to the present day.