Breadcrumb Home > Thesaurus > P Synonyms of palaeencephalon Find synonyms for: Noun1. paleencephalon, paleoencephalon, palaeencephalon, neural structureusage: the more primitive parts of the brain phylogenetically; most structures other than the cerebral cortexWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: solecism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language