The Forgotten Frontier. Word Search Puzzle Solver. The Forgotten Frontier word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. The Forgotten Frontier (1931) is a documentary film about the Frontier Nursing Service nurses on horseback who traveled the back roads of the Appalachian Mountains of the eastern United States. This includes identifying and searching for words that are related to : Mary Breckinridge, Drama, Documentary .