Breadcrumb Home > Thesaurus > K Synonyms of knuckle Find synonyms for: Noun 1. knuckle, knuckle joint, metacarpophalangeal joint, synovial joint, articulatio synovialis, diarthrosis usage: a joint of a finger when the fist is closed Verb 1. knuckle, press usage: press or rub with the knuckles 2. knuckle, shoot usage: shoot a marble while keeping one's knuckles on the ground WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of knuckle (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: supererogatory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language