Synonyms of roller coaster

Noun

1. roller coaster, turbulence, upheaval, Sturm und Drang

usage: anything characterized by abrupt and extreme changes (especially up and down); "the economy has been on a roller coaster all year"

2. roller coaster, big dipper, chute-the-chute, elevated railway, elevated railroad, elevated, el, overhead railway, ride

usage: elevated railway in an amusement park (usually with sharp curves and steep inclines)