/ Thesaurus / B Synonyms of believe in Find synonyms for: Verb1. believe in, believeusage: have a firm conviction as to the goodness of something; "John believes in oat bran"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language