/ Thesaurus / V Synonyms of vitamin k1 Find synonyms for: Noun1. vitamin K1, phylloquinone, phytonadione, vitamin K, naphthoquinone, antihemorrhagic factorusage: a form of vitamin KWordNet 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