The term C-shaped carpentry gadget is a 5-letter word that can be solved as 'CLAMP'. A CLAMP is a device used to hold two or more objects together, usually made of metal or plastic. It is commonly used in carpentry and other construction projects to secure pieces of wood or other materials together. Clamps come in various shapes and sizes, and the C-shaped variety is designed to fit around the edges of two pieces of material, providing a secure hold.