Fishing sinker is an essential accessory in fishing that is used to weigh down the fishing lure, helping it to sink in the water. There are several synonyms for a fishing sinker such as fishing weight, cast weight, lead weight, and plummet. Fishing weight is a common term used to refer to any type of sinker, whether it is made of lead, brass, or steel. Cast weight is a term used for a specific type of sinker with a tapered design, allowing for longer casts and better accuracy. Lead weight and plummet are also commonly used terms for a fishing sinker, with plummet referring to the bottom shape of the weight.