/ Thesaurus / S Synonyms of steam organ Find synonyms for: Noun1. calliope, steam organ, musical instrument, instrumentusage: a musical instrument consisting of a series of steam whistles played from a keyboardWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language