/ Thesaurus / V Synonyms of vitamin b complex Find synonyms for: Noun1. B-complex vitamin, B complex, vitamin B complex, vitamin B, B vitamin, B, water-soluble vitaminusage: originally thought to be a single vitamin but now separated into several B vitaminsWordNet 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