/ Thesaurus / S Synonyms of senile dementia Find synonyms for: Noun1. senile dementia, senile psychosis, dementia, dementednessusage: dementia of the aged; results from degeneration of the brain in the absence of cerebrovascular diseaseWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language