/ Thesaurus / F Synonyms of flintstone Find synonyms for: Noun1. flintstone, flintusage: pebbles of flint used in masonry constructionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language