plural of free rider

(medicine) A bony deposit in the muscles of the upper and inner part of the thigh, due to the pressure and irritation caused by the saddle in riding.

(Australia) A person employed to travel along the boundary of a station, to check and maintain the fencing.

plural of post rider

plural of dispatch rider

(military) A messenger on a motorcycle. / A postrider or mounted courier (eg the US Pony Express)

plural of boundary-rider

plural of freedom rider

plural of surf-rider

plural of boundary rider