the hard fibrous material that forms the main substance of the trunk or branches of a tree or shrub
It depends of the piece of wood itself and the type of wood that it is.
The piece is made of oak wood.
A flat piece of wood is called a board.
The small piece of wood on the clarinet is the reed.
PANEL
A bored board is a piece of wood that has nothing to do.
A thin piece of wood?
A thick piece of wood is commonly referred to as a plank.
A thick piece of wood is called a plank. It is a long, flat piece of wood that is often used in construction or woodworking projects.
petrified wood
into a piece of wood
A piece of wood siding is called a clapboard or a plank.