/ Thesaurus / F Synonyms of flat bellied Find synonyms for: Adjective1. bellyless (vs. bellied), flat-belliedusage: lacking a prominent bellyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language