/ Thesaurus / C Synonyms of coin machine Find synonyms for: Noun1. slot machine, coin machine, machineusage: a machine that is operated by the insertion of a coin in a slotWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language