wagon box or wagon bed noun

The carrying part of a wagon

wagˈonload noun

1. The load carried by a wagon
2. A great amount

wagon lock noun

A kind of iron shoe or other device placed on the rear wheel of a wagon to retard motion in going downhill

wagon roof or wagon vault noun

A barrel vault

wagon train noun

1. A collection or service of army vehicles for the conveyance of ammunition, provisions, the sick, etc
2. A train of usu horse-drawn wagons used by pioneer settlers to travel into new territory (historical)

wagˈonwright noun

A maker of wagons

on (or off) the wagon (informal)

Abstaining (or no longer abstaining) from alcohol

the Wagon

The Plough, the seven brightest stars in the constellation Ursa Major

the Wagoner or Waggoner

The constellation Auriga