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Noun: roller coaster  'row-lu(r),kow-stu(r)
  1. Anything characterized by abrupt and extreme changes (especially up and down)
    "the economy has been on a roller coaster all year"
     
  2. Elevated railway in an amusement park (usually with sharp curves and steep inclines)
    - big dipper, chute-the-chute

Derived forms: roller coasters

Type of: el [US], elevated, elevated railroad, elevated railway, overhead railway, ride, Sturm und Drang, turbulence, upheaval

Encyclopedia: Roller coaster

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Rollerblade
rollerblader
rollerblading
roller-skater
rollick
rollicking
rollickingly