Torr is a unit of pressure that measures the force exerted by a gas on a surface. It is equivalent to 1/760th of one standard atmosphere of pressure. While it is a widely recognized unit, there are several synonyms for torr that can be used depending on the context. Some of these synonyms include mmHg (millimeters of mercury), Pa (pascals), psi (pounds per square inch), and bar (a unit of pressure equal to 100 kilopascals). The choice of which synonym to use will depend on the specific application and audience. However, all of these units share the same fundamental principle of measuring pressure and can be used interchangeably in most cases.