/ Thesaurus / A Synonyms of assault rifle Find synonyms for: Noun1. assault rifle, assault gun, automatic rifle, automatic, machine rifleusage: any of the automatic rifles or semiautomatic rifles with large magazines designed for military useWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language