/ Thesaurus / R Synonyms of riot gun Find synonyms for: Noun1. riot gun, firearm, piece, small-armusage: a firearm designed to disperse rioters rather than to inflict serious injury or deathWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language