GNATHOSTOMATA Antonyms There are 3 antonyms of the word gnathostomata. (opposite meanings)Did you mean?Definition of GNATHOSTOMATASynonyms of GNATHOSTOMATABest Opposite Words For GNATHOSTOMATATop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1agnathanoun, adjectiven, adj2biramousadjectiveadj3uniramousadjectiveadj Alternatives for BIRAMOUS Words (7)branchedforkedbifurcateforficatefork-likeprongedprongyOpposite words for biramous