Earth

3. a natural underground chamber in a hillside or cliff.
5. a large rock, typically one that has been worn smooth by erosion.
7. the upper layer of earth, a dark mixture of organic remains, clay, and rock particles.
8. soft, sticky matter resulting from the mixing of earth and water.
10. a loose granular substance, typically pale yellowish brown.
12. a yellow precious metal.
14. a solid material which is typically hard, shiny, malleable, fusible, and ductile.
15. personal ornaments made from or contain jewels and precious metal.
17. a living organism of the kind exemplified by trees, shrubs, herbs, grasses, ferns, and mosses.
19. the reproductive structure found in flowering plants.
21. a precious stone, especially one cut, polished, and used in a piece of jewellery.

1. a small stone made smooth and round by the action of water or sand.
2. a large natural elevation of the earth's surface rising abruptly.
4. vegetation consisting of typically short plants with long, narrow leaves.
6. an area of land overgrown with dense forest and tangled vegetation, typically in the tropics.
7. the unit of reproduction capable of developing into another such plant.
9. hard solid non-metallic mineral matter of which rock is made.
11. a waterless, desolate area of land with little or no vegetation, typically one covered with sand.
13. a flattened structure of a higher plant, typically green and blade-like.
14. an excavation in the earth for extracting coal or other minerals.
16. a steep rock face, especially at the edge of the sea.
18. a woody perennial plant.
20. the solid mineral forming part of the surface of the earth.
22. an area of low-lying, uncultivated ground where water collects; a bog or marsh.