kneeler

One who kneels, as to pray.

Something, such as a stool, cushion, or board, on which to kneel.

One who kneels, or worships by kneeling.

In the early church, one of a class of penitents who were permitted to occupy a kneeling position between the ambo and the door of the church.

One who kneels or who worships by or while kneeling.