Gunter's chain, also known as surveyor's chain, is a tool used by surveyors to measure an area of land. However, there are various synonyms for Gunter's chain that are used in different parts of the world. In the United States, it is commonly called a surveyor's chain, while in the United Kingdom and Australia, it is known as a chain or engineer's chain. Other synonyms include Gunter's measure, numerical chain, and measuring chain. Additionally, there are variations of the chain, such as the engineer's chain which is 100 feet long and the land chain which is 66 feet long. Despite the different names, all these chains serve the same purpose of measuring land accurately.