Action, reaction

1. the ability or capacity to do something or act in a particular way
4. strongly affecting how a situation will progress or end
6. stupid or unreasonable and deserving to be laughed at
8. a strong, hard hat that covers and protects the head
10. trying to do something, although it is very difficult
11. reward for a talented person
12. how fast something moves
17. synonym to brave
18. try earnestly or persistently to persuade someone to do something
19. a series of contests between a number of competitors, competing for an overall prize.
20. full of hope and confidence, or giving cause for hope and confidence

2. to come from behind another vehicle or a person and move in front of them
3. a person who is in charge of a sports game and who makes certain that the rules are followed
5. using force to hurt or attack
7. willing to give money, help, kindness, etc., especially more than is usual
9. your teammate
13. to appear by coming out of something or out from behind something
14. a person who watches an activity, especially a sports event, without taking part
15. if you walk under a ladder it brings you bad luck
16. especially in sports or other competitions to be in front, to be first, or to be winning