/ Thesaurus / S Synonyms of steam whistle Find synonyms for: Noun1. steam whistle, whistleusage: a whistle in which the sound is produced by steam; usually attached to a steam boilerWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language