Breadcrumb Home > Thesaurus > I Cite Synonyms of inability Find synonyms for: Noun1. inability, cognition, knowledge, noesisusage: lack of ability (especially mental ability) to do something2. inability, unfitness, qualityusage: lacking the power to performWordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.Definition and meaning of inability (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress The Women's March on Versailles Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: obscurant Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language