/ Thesaurus / A Synonyms of anatomical sphincter Find synonyms for: Noun1. sphincter, anatomical sphincter, sphincter muscle, muscle, musculususage: a ring of muscle that contracts to close an openingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language