We don't have synonyms for railway lines yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are railway line.
(n) :
(chiefly UK) A railway track; a pair of rails on which a railway train runs.
(n) :
(chiefly UK) A group of railway tracks running parallel, allowing one track to be used for each direction (a double-track railway line), or allowing segregation of fast trains from stopping trains (a four-track railway line).
(n) :
(chiefly UK) An organization that runs a railroad.
(n) :
(chiefly UK) A railway track; a pair of rails on which a railway train runs.
(n) :
(chiefly UK) A group of railway tracks running parallel, allowing one track to be used for each direction (a double-track railway line), or allowing segregation of fast trains from stopping trains (a four-track railway line).
(n) :
(chiefly UK) An organization that runs a railroad.