This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A failure to perform a task, especially a task that one was legally bound to do.

n. Neglect or failure to perform.

n. A failure or neglect to perform.

n. failure to act with the prudence that a reasonable person would exercise under the same circumstances

"Of course, I could have upped the payoff for "nonperformance" on my part to, say, $1,000."

nonaccomplishment    nonachievement   

noncompliance   

neglect of duty    contributory negligence    criminal negligence    culpable negligence    evasion    comparative negligence    dereliction    concurrent negligence    dodging    escape   

acronyms    non-fulfilment    noncompliance    baa-rated    inflation-indexed    n-period    remind    nonproduction    higher-yielding    blood-oath