/ Thesaurus / R Synonyms of running back Find synonyms for: Noun1. running back, backusage: (football) a back on the offensive team (a fullback or halfback) who tries to advance the ball by carrying it on plays from the line of scrimmageWordNet 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