1. WORLD
1.1. All the time in the world
1.1.1. You have plenty of time
1.1.2. ex: Take it easy,you have all the time in the world
1.2. Out of this world
1.2.1. Something is so good and unbelievable
1.2.2. ex:she is so beautiful,She is out of this world.
1.3. Worldwide
1.3.1. Something is extending throughout the entire world
1.3.2. ex:A worldwide epidemic
1.4. Think the world
1.4.1. when you have great affection and respect for someone
1.4.2. ex:I love my parents,I think the world of them.
1.5. On top of the world
1.5.1. When you feel absolutely fantastic.
1.5.2. ex: I am getting married,I am on top of the world.
2. FLOOR
2.1. The dance floor.
2.1.1. The place where people dance.
2.1.2. ex: They are on the dance floor.
2.2. The ocean floor.
2.2.1. It is the land at the bottom of the sea.
2.2.2. ex:There are plenty of weird fish at the ocean floor.
2.3. Floorboards
2.3.1. The planks of wood in a wooden floor
2.3.2. ex: They just floorboards to my house.
3. EARTH
3.1. On earth
3.1.1. Added for emphasis to a question,or to show you are surprised or annoyed.
3.1.2. ex: What on earth is coming on?
3.2. It costs the earth
3.2.1. Something is very expensive.
3.2.2. ex:My necklace cost the earth.
3.3. Earth-shattering.
3.3.1. An event or a new is extremely shocking and important.
3.3.2. ex:The president is dead,it is earth-shattering.
4. GROUND
4.1. On the ground
4.1.1. To be realistic and practical.
4.1.2. ex:He doesn't love you,you must keep your feet on the ground.
4.2. Grounded
4.2.1. Someone is sad or depressed.
4.2.2. ex:I didn't get my schoolarship,I am so grounded.
4.3. Off the ground
4.3.1. When a plan or business starts to succed.
4.3.2. ex: My company just gets on the ground