Breadcrumb Home > Thesaurus > R Synonyms of regulus Find synonyms for: Noun1. Regulususage: the brightest star in Leo2. Regulus, genus Regulus, bird genususage: a genus of birds of the family Sylviidae including kingletsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of regulus (Dictionary) ✖ Related Content Daily Word Quiz: donnybrook Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language