IONISE Antonyms There are 2 antonyms of the word ionise. (opposite meanings)Did you mean?Definition of IONISEAlso try opposite words for..ionionicionizedionizerionizingBest Opposite Words For IONISETop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1deionizeverbv2neutralizeverbv Alternatives for DEIONIZE Words (9)clarifycleansedetoxifydisinfectfilterpurifyrefinesanitizetreatOpposite words for deionize Alternatives for NEUTRALIZE Words (9)neutralisecounteractcounterbalancecountervailliquidatenegatenullifywastecounterweighPhrases (2)do inknock offOpposite words for neutralize