Breadcrumb Home > Thesaurus > N Synonyms of nonperformance Find synonyms for: Noun 1. negligence, carelessness, neglect, nonperformance, nonaccomplishment, nonachievement usage: failure to act with the prudence that a reasonable person would exercise under the same circumstances WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of nonperformance (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language