chisel
An adze
It is a plane
Knife
The adze is a wood shaping tool. The axe is a tool to cut wood. Carpenters Awl
Three objects pop into my mind: awl (tool used for punching small holes in wood), adz (axlike tool with a curved blade at right angles to the handle used for shaping wood), and axe (for cutting wood) I guess it's adz you're searching for. I think you meant 'shaping' instead of 'shaving'.
Axe, Awl, Adz
Adz. It is an axe that has the blade turned 90 degrees so that when it is struck against a piece of wood it chips towards the worked. Then again axe is also a three letter wood shaping tool.
The tool is used for cutting and shaping wood.
A wood shaping tool that is three letters could be: - Adz - Awl - Axe - Saw
plane
Chisel????
Rasp.