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WordNet-Online 
 
Noun nonperformance has 1 sense 
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| nonparticuulate radiation nonpartisan nonpartisanship nonpartizan nonpasserine nonpasserine bird nonpathological nonpayment nonperformance nonperiodic nonpersistent nonperson nonpersonal nonphilosophic nonphilosophical nonphotosynthetic nonphysical 
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