Based on the clue 'a rainbow bridge called bifrost linked midgard the...', what is the answer?

Based on the clue 'a railroad or a gambling game you could be railroa...', what is the answer? Based on the clue 'a railroad president named aberdeen south dakota f...', what is the answer? Based on the clue 'a railroad tunnel under the mersey river connects ...', what is the answer? Based on the clue 'a railway link across the mekong river connects th...', what is the answer? Based on the clue 'a raincoat often yellow named for its glossy appea...', what is the answer? Based on the clue 'a raindrops shape depends on its size one with a d...', what is the answer? Based on the clue 'a rained on fast plane', what is the answer? Based on the clue 'a raised open platform at the stern of a ship', what is the answer?