LEAKPROOF Antonyms There are 2 antonyms of the word leakproof. (opposite meanings)Did you mean?Definition of LEAKPROOFSynonyms of LEAKPROOFBest Opposite Words For LEAKPROOFTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1permeableadjectiveadj2porousadjectiveadj Alternatives for PERMEABLE Words (7)absorbentopenpassablepenetrablepermeativeperviousporousOpposite words for permeable Alternatives for POROUS Words (10)permeableabsorbentabsorptivebibulousosmoticpenetrableporousspongyholeyporiferousOpposite words for porous