Britains Greatest Invention. Word Search Puzzle Solver. Britains Greatest Invention word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. BBC Two takes us inside the world's biggest invention time capsule - the Science Museum vaults - and asks the nation to vote for Britain's Greatest Invention. This includes identifying and searching for words that are related to : Documentary, Hannah Fry, Hannah Fry, Documentary .