/ Thesaurus / U Synonyms of undiagnosable Find synonyms for: Adjective1. undiagnosable, unidentifiable (vs. identifiable)usage: not possible to diagnoseWordNet 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