/ Thesaurus / C Synonyms of contraceptive diaphragm Find synonyms for: Noun1. diaphragm, pessary, contraceptive diaphragm, contraceptive, preventive, preventative, contraceptive device, prophylactic device, birth control deviceusage: a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervixWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language