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. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: spelunk Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language