/ Thesaurus / F Synonyms of flat solid Find synonyms for: Noun1. sheet, flat solid, artifact, artefactusage: a flat artifact that is thin relative to its length and widthWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language