/ Thesaurus / F Synonyms of french horn Find synonyms for: Noun1. French horn, horn, brass, brass instrumentusage: a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valvesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language