board
board
That would depend on the thickness of the plank. It would also vary, depending on the type of wood, and where you buy it (what country, for instance).
Wood, timber, tree .... plank
board
A board walk
Board.
board
board
board
board or boards
Board
'Board' must be the answer you are looking for.
Board.
Planking. As in acting like a plank of flat wood.
The plank was of wood, a few inches wide
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