metro (n.)
- branch
- choo-choo
- el
- electric
- elevated
- embankment
- express
- feeder
- flier
- freight
- freighter
- funicular
- junction
- limited
- line
- local
- monorail
- rail
- railroad
- railway
- rattler
- roadbed
- roadway
- shuttle
- sidetrack
- siding
- special
- streamliner
- subway
- terminal
- terminus
- track
- train
- tram
- tramline
- trestle
- trunk
- tube
- turnout
- underground
