The rightest and Best

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Across
  1. 2. place where water flows over the edge of a cliff or rock onto another level bellow
  2. 5. try to be better than others taking part in a competition
  3. 6. attractive and graceful
  4. 8. the world's most famous sporting event being held once every four years
  5. 10. fantastic features which exist in nature and are not created by people
  6. 11. people who design buildings
Down
  1. 1. someone who is good at sports and takes parts in sports competitions
  2. 3. admired and respected
  3. 4. best achievements so far in the world in particular activities, especially sport
  4. 7. astonishing and impressive
  5. 9. adjectives or phrases used for expressing the greetest degree of something