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By suspended do you mean Suspended or Inverted?
The translation of the English word, 'Roller Coaster' is..
Roller Coaster
Roller coaster's doesn't take the place of anything but it shows possession.
Example: roller coaster's design
The slope of a roller coaster describes how steep the roller coaster is. Knowing the angle of the slope will tell you how steep a roller coaster is.
roller coaster