Breadcrumb Home > Thesaurus > T Synonyms of thwack Find synonyms for: Noun 1. thwack, blow usage: a hard blow with a flat object Verb 1. smack, thwack, hit usage: deliver a hard blow to; "The teacher smacked the student who had misbehaved" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of thwack (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language