mandrel or mandril /manˈdrəl/

1. A bar of iron fitted to a turning-lathe on which articles to be turned are fixed
2. The axle of a circular saw
3. A miner's pick

• gravity waves
• gravlax
• gravlaxes
• gravure
• gravures
• gravy
• gravy boat
• gravy boats
• gravy-soup
• gravy-soups
• gravy train
• gravy trains
• gray
• Gray code
• grayed
• grayer
• grayest
• grayflies
• grayfly
• graying
• grayle
• grayles
• grayling
• graylings
• grays