COSTAL Antonyms There are 2 antonyms of the word costal. (opposite meanings)Did you mean?Definition of COSTALAlso try opposite words for..costcostscostingBest Opposite Words For COSTALTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1inlandadverb, adjectiveadv, adj2interiornoun, adjectiven, adj Alternatives for INLAND Words (14)backwoodsbushcentralcountrydomesticheartlandhinterlandinteriormainlandmiddlemidlandruralbackcountrybacklandOpposite words for inland Alternatives for INTERIOR Words (14)insideinternalinnercentralcoreinmostinnermostinwardmiddlewithinhomemidlandnationalupcountryPhrases (2)department of the interiorinterior departmentAbbreviations (1)doiOpposite words for interior