it is called level
A plane surface.
flat and even
It is called a "wash." It creates a flat, even layer of color when diluted ink is applied to a large area with a brush.
an a flat only can be called an a flat There is no double sharp equivalent, but it is the same as G sharp.
Indian flat bread is called Naan. -
A flat piece of wood is called a board.
A flat disc of cheese is called a wheel.
Yes, it can be done. A note used that's not in the key is called an accidental.
A flat area is called a plane. A flat area the is elevated higher than all the surrounding land is called a plateau.
level
Clouds in flat layers are called stratus.
A flat circular object is called a disk or a round.