1. Repetition.

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

• iretation,
• aterations,
• oeration,
• itegration,
• iterigation,
• itterations,
• aderation,
• irration,
• atercation,
• ineration,
• intereation,
• tration,
• interration,
• iration,
• opteration,
• interation,
• deteration,
• iteruption,
• hiberation,
• attration

• iterate,
• iterative.

The adjective form of the word "iteration" is "iterative".

The plural of the "iteration" can be the "iterations".

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