1. Floor
1.1. floorboards
1.1.1. def: any of the boards composing a floor
1.1.1.1. ex: the floorboards of my house are very old
1.2. ocean floor
1.2.1. def: the subterranean part of the sea
1.2.1.1. ex: the ocean floor looks like mountains
1.3. dance floor
1.3.1. def: a place for to dance
1.3.1.1. ex: we want to have a dance floor in our house
2. Ground
2.1. on the ground
2.1.1. def: to be realistic
2.1.1.1. ex: now, with your baby, you have to keep your feet on the ground
2.2. grounded
2.2.1. def: very sad
2.2.1.1. ex: I am grounded about killing animals
2.3. off the ground
2.3.1. def: start something
2.3.1.1. ex: The play never got off the ground
3. Earth
3.1. earth-shattering
3.1.1. def: sufficiently significant to affect the whole world
3.1.1.1. ex:It need not be earth-shattering. But it should be something that mattered greatly to you
3.2. cost the earth
3.2.1. def: very expensive
3.2.1.1. ex: this dress cost the earth
3.3. on earth
3.3.1. def: in the world
3.3.1.1. New ex: What on earth is he doing with a spade?node
4. World
4.1. worldwide
4.1.1. def: global, universal
4.1.1.1. ex: mc donald's is a worldwide enterprise
4.2. all time in the world
4.2.1. def: a lot of time
4.2.1.1. ex: I have finished my studies. I have all time in the world now
4.3. out of this world
4.3.1. def: amazing, unbelievable
4.3.1.1. ex: the show was out of this world
4.4. think the world
4.4.1. def: to hold something or someone in very high esteem
4.4.1.1. ex: She thinks the world of her adviser
4.5. top of the world
4.5.1. def: extremely happy
4.5.1.1. ex: I am in the top of the world because I won the lotery!