/ Thesaurus / I Synonyms of illegibility Find synonyms for: Noun1. illegibility, incomprehensibilityusage: the quality of writing (print or handwriting) that cannot be decipheredWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language