Breadcrumb Home > Thesaurus > C Synonyms of caulk Find synonyms for: Noun 1. caulk, caulking, sealant, sealer usage: a waterproof filler and sealant that is used in building and repair to make watertight Verb 1. caulk, calk, seal, seal off usage: seal with caulking; "caulk the window" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of caulk (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: outr Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language