/ Thesaurus / C Synonyms of choo choo Find synonyms for: Noun1. choo-choo, locomotive, engine, locomotive engine, railway locomotiveusage: a child's word for locomotiveWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: foliage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language