This word is acceptable for play in the UK dictionary that is being used in the following games:

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• Wordscraper
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n. Alternative spelling of nonpartisanship.

"In his zeal for nonpartizanship Adams fairly leaned backwards, with the result that incompetents were shielded and the offices were left in the hands of men who, in a very large number of cases, were openly hostile to the President and to his policies."