Complete the text with the derivatives of the given words

The early Europeans in America lived on the East Coast. To the west, behind the line they called the "Frontier", the land was full of [ ] dangers. It was the land of [ ], or Native Americans. The pioneers moved farther and farther west until they reached the Pacific Ocean and the frontier was there no longer. But the idea of the land of [ ] cowboys and brave [ ] became part of the [ ] dream. A lot of people still believe that if you are strong and [ ], you can go to the land of [ ] plains and [ ] mountains and find your [ ] there.