Breadcrumb Home > Thesaurus > D Synonyms of dementia Find synonyms for: Noun 1. dementia, dementedness, insanity usage: mental deterioration of organic or functional origin WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of dementia (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: spelunk Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language