/ Thesaurus / G Synonyms of grease gun Find synonyms for: Noun1. grease-gun, gun, pumpusage: a hand-operated pump that resembles a revolver; forces grease into parts of a machineWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: chicory Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language