What is another word for tholepin?
Pronunciation: [thˈə͡ʊlpɪn] (IPA) 
Tholepin, also known as "oarlock" is a device which holds the oar in place while rowing. Though few synonyms exist for this specific word, several terms can be used to describe this type of mechanism including "rowlock," "gudgeon," and "peg." Sometimes tholepins can be referred to as "oar collars," "oarlocks," or "oar sockets." More generally, the term "paddle" might be used instead of "oar," while the corresponding mechanism holding the paddle in place could be called a "paddle lock" or "paddle holder." Regardless of the specific term, these devices are essential for effective rowing and paddling, preventing the oar or paddle from slipping out of position while propelling a boat in the water.
