/ Thesaurus / L Synonyms of light arm Find synonyms for: Noun1. light arm, weapon, arm, weapon systemusage: a rifle or pistolWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language