racer >> /ˈreɪsər/
Definition: [noun] An animal or means of transportation bred or designed especially for racing.
Example: tall-masted ocean racers
Definition: [noun] A fast-moving, harmless, and typically slender-bodied snake.
Example: A black snake - a harmless racer - dropped noisily from a low sable palm branch and disappeared into the underbrush.
Definition: [noun] A circular horizontal rail along which the carriage or traversing platform of a heavy gun moves.