/ Thesaurus / 9 Synonyms of 9 membered Find synonyms for: Adjective1. nine-membered, 9-membered, membered (vs. memberless)usage: of a chemical compound having a ring with nine membersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: kiln Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language