Loft.
The broad flat valley floors that are carved out by wondering streams are called flood plain and the two methods of the streams eroding the rocks to form the flood plain are down cutting and lateral erosion.
There are two different floors on the mansion of Ao Oni. The two floors are called the basement and the green floor.
A Floodplain.
A Flat Character
Because indians generally want to build 2 to 4 floors over and over on the flat roof...
It's called enharmonic spelling. An example is C-sharp and D-flat.
Lay it flat then tilt it to get a full colored door
A character who may be described in a sentence or two is called a flat character. They are minor characters who do not need a lot of description.
flat map
A hexagon, if flat (two-dimensional).
decks