/ Thesaurus / A Synonyms of american organ Find synonyms for: Noun1. American organ, free-reed instrumentusage: a free-reed instrument in which air is drawn in through reeds by suction bellowsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language