Breadcrumb Home > Thesaurus > I Synonyms of inability Find synonyms for: Noun 1. inability, cognition, knowledge, noesis usage: lack of ability (especially mental ability) to do something 2. inability, unfitness, quality usage: lacking the power to perform WordNet 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. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: rort Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language