/ Thesaurus / M Synonyms of mental lexicon Find synonyms for: Noun1. vocabulary, lexicon, mental lexicon, cognition, knowledge, noesisusage: a language user's knowledge of wordsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language