/ Thesaurus / R Synonyms of reentrant polygon Find synonyms for: Noun1. reentrant polygon, reentering polygon, concave polygonusage: a polygon with one or more reentrant anglesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language