This is part of a game called Caballus
Driving Terms
These are all I could think of at the moment, although I'll add more as I think of them.
Abreast: A hitch of horses side by side. Two abreast horses make a pair.
Blinders: An extension, typically of leather, that extends out from the bridle and prevents the horse from seeing behind them. Used primarily on driving horses to keep them from seeing and being frightened by the wheels of the carriage or cart behind them. Also called Blinkers or Winkers.
Blinkers: See Blinders.
Carriage: A horse drawn vehicle.
Cart: A term often used to refere to a two wheeled vehicle.
Groom: The groom is an assistant who helps the driver. They are a necessity for multiple horse teams, and four horse teams often require at least two grooms. The groom may not touch the reins or directly aid the driver while the team is being shown. A groom may act as a navigator in Marathon, and must move from side to side (and in some cases hang off of) the vehicle to keep in balanced in marathon or obstacle driving.
Hazard: Another term used for a Marathon obstacle.
In Hand: Any set of pairs hitched in a line. Four In Hand would be two pairs, one in front of the other. Six In Hand is three pairs of horses.
Pair: Two horses hitched abreast.
Random: Three horses hitched in a line. Very similar to tandem, except with three horses.
Sulky: A small, light, two wheeled cart that only seats one person. Used both for racing and for roadster classes.
Tandem: Two horses hitched singularly in a line.
Team: Any set of two or more horses hitched together. Sometimes used generally to refer to a pair.
Whip: Usually used to refer to the driver, who holds the reins and the whip and controls the horse.
Winkers: See Blinders.