The term "Wats Line" is commonly used to refer to a private line that is dedicated to voice communication. However, there are several synonyms for this term that can be used interchangeably. One synonym for Wats Line is private line, which refers to a communication channel that is exclusively used by a single organization. Another synonym is leased line, which is a dedicated communication channel that is rented out by a service provider to a customer. Other synonyms for Wats Line include direct line, dedicated line, and point-to-point line. Regardless of which synonym is used, the term refers to a secure and dedicated line that is ideal for voice communication and other sensitive applications.