Friction clutch is a type of clutch that uses friction to control the power transmission between two shafts. There are several synonyms for the word "friction clutch" that are commonly used in the automotive industry and mechanical engineering. One of the most popular synonyms is "friction plate clutch", which refers to the plates that are used to generate friction and control the movement of the clutch. Another synonym is "clutch disc", which is a type of circular plate that is placed between the engine and transmission to control the power flow. Other synonyms for friction clutch include "plate clutch", "slipper clutch", and "differential clutch".