maze, labyrinth
['tub, vat', 'radio telescope, radio reflector', 'plastic bag', 'amphibian, amphibious vehicle', 'police van, police wagon, paddy wagon, patrol wagon, wagon, black Maria', 'puck, hockey puck', 'ashcan, trash can, garbage can, wastebin, ash bin, ash-bin, ashbin, dustbin, trash barrel, trash bin']