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. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: foison Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language