/ Thesaurus / D Synonyms of dum dum Find synonyms for: Noun1. dumdum, dumdum bullet, bullet, slugusage: a soft-nosed small-arms bullet that expands when it hits a target and causes a gaping woundWordNet 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