/ Thesaurus / C Synonyms of cassius clay Find synonyms for: Noun1. Ali, Muhammad Ali, Cassius Clay, Cassius Marcellus Clayusage: United States prizefighter who won the world heavyweight championship three times (born in 1942)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language