Space

3. process of establishing occupation of or control over foreign territories or peoples
4. event causing great and usually sudden damage or suffering; a disaster
6. catastrophic conflict resulting in widespread destruction, loss of life, and devastation
8. destroy something completely
10. gas produced by burning organic compounds and by breathing
12. succeed in dealing with (a problem or difficulty)
13. a stock or amount of something available for use
14. to be able to buy or do something because you have enough money or time
15. group of people of one nationality or race living in a foreign place
18. period of one hundred years
19. countless, innumerable.
21. the human race

1. designed to absorb the sun's rays as a source of energy for generating electricity or heating
2. frontier outer space, especially from the perspective of space colonization
5. examination of a subject
7. curved path of a spacecraft round a star, planet, or moon
9. move quickly and suddenly
11. a stock or supply of money, materials, staff
13. needing no outside help in satisfying one's basic needs, especially with regard to the production of food.
16. unpleasantly rough, difficult
17. period or cycle of thousand years
20. to cover or reach a large area