/ Thesaurus / F Synonyms of factor xii Find synonyms for: Noun1. Hageman factor, factor XII, coagulation factor, clotting factorusage: coagulation factor whose deficiency results in prolongation of clotting time of venous bloodWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language