/ Thesaurus / D Synonyms of dilater Find synonyms for: Noun1. dilator, dilater, surgical instrumentusage: a surgical instrument that is used to dilate or distend an opening or an organWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language