Synchondrosis refers to the area where two bones meet and form a joint. It is characterised by a thin layer of hyaline cartilages and limited motion. Synchondrosis is a common term used in anatomy and physiology, but there are various synonyms for the word. These include "cartilaginous joint," "immovable joint," "primary cartilaginous joint," and "synarthrosis." All of these terms refer to the same type of joint and have a similar meaning. It is important to be familiar with these synonyms and understand their meaning in order to accurately describe and discuss the anatomy and function of joints in the human body.