/ Thesaurus / S Synonyms of substantia alba Find synonyms for: Noun1. white matter, substantia alba, nervous tissue, nerve tissueusage: whitish nervous tissue of the CNS consisting of neurons and their myelin sheathsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language