roller coaster
(roll-er-coast-er)
4 syllables
Definition
noun. 1 anything characterized by abrupt and extreme changes especially up and down; 2 elevated railway in an amusement park usually with sharp curves and steep inclines
Example Sentence
The economy has been on a roller coaster all year. Spelled as two words.
Synonyms
turbulence; upheaval; ups and downs; gravity railroad; amusement park ride
Antonyms
level ground
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roller coaster
