Breadcrumb Home > Thesaurus > P Synonyms of proenzyme Find synonyms for: Noun1. proenzyme, zymogen, organic compoundusage: any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become activeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of proenzyme (Dictionary) ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language