/ Thesaurus / H Synonyms of hyperdactyly Find synonyms for: Noun1. polydactyly, hyperdactyly, birth defect, congenital anomaly, congenital defect, congenital disorder, congenital abnormalityusage: birth defect characterized by the presence of more than the normal number of fingers or toesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language