/ Thesaurus / G Synonyms of genus halcyon Find synonyms for: Noun1. Halcyon, genus Halcyon, bird genususage: a large kingfisher widely distributed in warmer parts of the Old WorldWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language