Breadcrumb Home > Thesaurus > C Synonyms of catalyst Find synonyms for: Noun 1. catalyst, accelerator, activator usage: (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected 2. catalyst, causal agent, cause, causal agency usage: something that causes an important event to happen; "the invasion acted as a catalyst to unite the country" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of catalyst (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: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language