rollercoaster
noun
°An amusement ride consisting of a buggy on a track that rises, falls, twists and turns.
°(by extension) Any situation in which there are violent changes in status.
adjective
°Of or like a rollercoaster.
synonyms: big dipper, switchback, merry-go-round, ride more» , saga, seesaw, soap opera, stir, yo-yo