HYPERTONIC Antonyms There are 2 antonyms of the word hypertonic. (opposite meanings)Did you mean?Definition of HYPERTONICAlso try opposite words for..hypertoniahypertonushypertonicityBest Opposite Words For HYPERTONICTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1hypotonicadjectiveadj2isotonicadjectiveadj Alternatives for ISOTONIC Words (1)isosmoticOpposite words for isotonic