Rug
Assuming it covers the entire floor, a carpet is une moquette. If it only covers a portion of the floor, it is un tapis.
sand (sometimes shells)
The mantle
rug
rug or mat
Little undergrowth in deep shade.
Desert pavement
The best options for floor outlet covers to improve safety and appearance in your home are tamper-resistant covers that blend well with your flooring, such as flush-mounted or pop-up covers. These covers help prevent electrical hazards and maintain a sleek look in your living space.
The abyssal plain.
the border
Another word for "it covers the floor" is "flooring." This term refers to the material or surface that is laid down to cover a floor, such as carpet, tiles, or hardwood. Additionally, "carpet" or "rug" can be used depending on the context, particularly when referring to soft coverings.
No, there isn't sand on the floor of the colosseum because there is no floor. What was once was the floor is gone. When you visit it you look down into what was under the floor originally. When the Romans used the colosseum they could flood the floor to have sea battles.