This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A quality of an action such that repetitions of the action have no further effect on outcome – being idempotent.

"The idempotence guarantee means you can simply issue the request again."

nilpotence    idempotent    unipotence