roller-coaster (Brit also switchback)

n type of railway with open cars, tight turns and very steep slopes (found in funfairs, amusement parks, etc) 过山车, 云霄飞车（游乐场、 娱乐园等处的惊险游戏车）.

roll, roll around, roll back, roll in, roll into, roll of honour, roll out, roll up, roll-bar, roll-call, roll-on, roll-on roll-off, roll-top desk, roll-up, rolled gold, rolled oats, roller, roller bandage, roller towel, roller-blade, roller-skate (also skate), roller-skating, rollicking, rolling stone, rolling-mill, rolling-pin, rolling-stock, rollmop, Rolls-Royce, roly-poly, ROM, Roman, Roman candle, Roman Catholic (also Catholic), Roman nose, Roman numerals, Romance, Romanesque, Romania, Romano-,