/ Thesaurus / S Synonyms of self doubt Find synonyms for: Noun1. diffidence, self-doubt, self-distrust, timidity, timidness, timorousnessusage: lack of self-confidenceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language