1. Repetition.

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

• reistration,
• resturation,
• regitration,
• reumeration,
• reatoration,
• restration,
• retoration,
• reseration,
• reperation,
• reoperation,
• deteration,
• reinteration,
• receration,
• regeration,
• resteration,
• reitteration,
• preteration,
• resiteration,
• reitereation,
• riteration

• retardation,
• retardant,
• retreating,
• reiterative,
• reiterate,
• retreatant,
• retreated.

The adjective form of the word "reiteration" is "reiterative".

The plural of the "reiteration" can be the "reiterations".

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