/ Thesaurus / U Synonyms of unassumingness Find synonyms for: Noun1. sincerity, unassumingness, naturalnessusage: a quality of naturalness and simplicity; "the simple sincerity of folk songs"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: polyglot Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language