/ Thesaurus / R Synonyms of rat terrier Find synonyms for: Noun1. rat terrier, ratter, terrierusage: any of several breeds of terrier developed to catch ratsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language