metro Synonyms

tube underground subway subway system public transport MRT magnetron rapid transit mass transit light rail public transit railway station monorail big-city newspaper department pentode urban transportation service rail rapid transit busline tracks electric train underground railroad tramline underground railway train track railroad station maglev downtown subterranean shuttle railway railroad rail municipal metropolitan metre meter track train tram passenger train choo-choo rail line elevated railway belowground klystron urban undergrow tubing line