1. A robber.

2. One who rides on a horse; one who breaks or manages a horse; an addition made to a document; an additional clause.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ridell,
• riuver,
• idear,
• rieder,
• fridey,
• redel,
• risde,
• rvier,
• ridders,
• proder,
• reden,
• rideon,
• raideo,
• sride,
• prder,
• remder,
• urder,
• ridof,
• reide,
• radeo

• Ritter,
• reider,
• Riter,
• rioter,
• raider,
• Ridder,
• Rieder.

The adjective form of the word "rider" is "riderly" or "rider-like".

The plural of the "rider" can be the "riders".

The singular of the "rider" can be the "rider".