/ Thesaurus / U Synonyms of unconscientiousness Find synonyms for: Noun1. unconscientiousness, conscienceusage: the quality of being willing to ignore the dictates of conscience2. unconscientiousness, carelessness, sloppinessusage: the trait of not being painstaking or carefulWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language