/ Thesaurus / B Synonyms of breech closer Find synonyms for: Noun1. breechblock, breech closer, blockage, block, closure, occlusion, stop, stoppageusage: a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language