/ Thesaurus / M Synonyms of mental illness Find synonyms for: Noun1. mental illness, mental disease, psychopathy, psychological state, psychological condition, mental state, mental conditionusage: any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric interventionWordNet 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