/ Thesaurus / L Synonyms of leukoencephalitis Find synonyms for: Noun1. leukoencephalitis, encephalitis, cephalitis, phrenitisusage: inflammation of the white matter of the brainWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language