Breadcrumb Home > Thesaurus > T Synonyms of trepan Find synonyms for: Noun 1. trepan, trephine, surgical instrument usage: a surgical instrument used to remove sections of bone from the skull 2. trepan, drill usage: a drill for cutting circular holes around a center Verb 1. trepan, bore, drill usage: cut a hole with a trepan, as in surgery WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of trepan (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: cognoscenti Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language