/ Thesaurus / R Synonyms of rachet Find synonyms for: Noun1. ratchet, rachet, ratch, mechanical deviceusage: mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one directionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language