/ Thesaurus / P Synonyms of prothrombin accelerator Find synonyms for: Noun1. proaccelerin, prothrombin accelerator, accelerator factor, factor V, coagulation factor, clotting factorusage: a coagulation factorWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language