Breadcrumb Home > Thesaurus > A Synonyms of arcanum Find synonyms for: Noun1. secret, arcanum, information, infousage: information known only to a special group; "the secret of Cajun cooking"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of arcanum (Dictionary) ✖ Related Content Daily Word Quiz: nabob Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language