difference between ground, land, floor, and earth

ground land earth floor
These are all words for the surface that you walk on.

• floor  -  the surface of a room that you walk on: She was sitting on the floor watching TV.

• ground -  (often the ground) the solid surface of the earth that you walk on: I found her lying on the ground. The rocket crashed a few seconds after it left the ground.

• land -  the surface of the earth that is not sea: It was good to be back on dry land again. They fought both on land and at sea.

• earth - (often the earth) the solid surface of the world that is made of rock, soil, sand, etc.: You could feel the earth shake as the truck came closer.

ground, land, or earth?

Ground is the normal word for the solid surface that you walk on when you are not in a            building or vehicle. You can use earth if you want to draw attention to the rock, soil, etc. that the ground is made of.Land is used only when you want to contrast it with the sea:

patterns 

• on/under the floor/ground/earth
• bare floor/ground/earth
• to drop to/fall to the floor/the ground/(the) earth
• to reach the floor/the ground/land