swage
The type of tool you might be referring to is called an "Adz".It's an axe-like tool where the blade is at a right angle to the handle, the blade is curved for shaping wood.
It is done on a lathe and is called Turning.
reamer
A wood shaping tool that is three letters could be: - Adz - Awl - Axe - Saw
Chisel
plane
chisel
An adze
Chisel????
chisel
It is a plane