subway Synonyms

metro rapid transit tube underpass underground railway underground freight train public transit elevated railway gray market magnetron maglev passenger train rail line railway line iron horse choo-choo underground rail system subway system pedestrian underpass tunnels busline trains underground railroad railroad station light rail crawlway crawl space tree lawn railway station monorail klystron public transport pipette pipe locomotive line hole funicular conduit chute channel cannula bus burrow antre rail railroad railway warren