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Multi-word Results
| roller bearing |
a bearing in which the shaft turns with steel rollers that lessen friction. |
| roller coaster |
an amusement park ride in which a small, gravity-propelled train of open cars rides rapidly up and down a curving, winding, track built on trestles. |
| roller skate |
a shoe, or frame fitting over a shoe, with four small rollers or wheels, designed for skating on a hard surface. |
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