CAULKING Scrabble 15 Words With Friends 20 Definition noun a waterproof filler and sealant that is used in building and repair to make watertight. — synonyms: caulk Examples “Oakum was used for the caulking of the hulls of wooden ships.” See all 106 words you can make from CAULKING → 8-letter words Words starting with C Words ending with G ← Unscramble different letters