We don't have synonyms for sidings yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are tidings, siding and ridings.
(n) :
(Canada, US) A building material which covers and protects the sides of a house or other building.
(n) :
(rail transport) A second, relatively short length of track just to the side of a railroad track, joined to the main track by switches at one or both ends, used either for loading or unloading freight, storing trains or other rail vehicles; or to allow two trains on a same track to meet (opposite directions) or pass (same direction) (the latter sense is probably an American definition).
(n) :
(Canada, US) A building material which covers and protects the sides of a house or other building.
(n) :
(rail transport) A second, relatively short length of track just to the side of a railroad track, joined to the main track by switches at one or both ends, used either for loading or unloading freight, storing trains or other rail vehicles; or to allow two trains on a same track to meet (opposite directions) or pass (same direction) (the latter sense is probably an American definition).